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ENGLISH - 1/20

MI001503-E

S311D-XX-L / S311D-XX-H Line

Advanced Digital Indicators-Totalizers
4, 6, 8, 11 Digits Display

Universal opto isolated digital input; admitted types: reed, npn (2 wires or 24 V), pnp (24 V), 
NAMUR, photoelectric, Hall, 24 V input, TTL, variable reluctance.
Digital input signal frequency measurement from 0.00015 Hz to 10 kHz.
Increment or decrement totalizing of the digital input signal. 
View of the frequency measurement and/or totalized value.
Programmable retransmission of the input value frequency by the isolated analog output 
(voltage or active/passive current). 
Retransmission of the totalized value by the isolated digital output (Open Collector). 
Totalizer value is saved on non-volatile memory. 
Filter programmable at 20 levels to stabilise reading.
Totalizer reset by auxiliary digital input, buttons pressure or Modbus register.
4, 6, 8 or 11 (4+7) Digits display.
In case of optional card use, two relay alarms are activable on the input measurement 
frequency (maximum, minimum, automatically resettable or not).  
Alarms status visible through two leds on the frontal panel.
RS485 serial communication with MODBUS RTU protocol (by optional board), maximum 
32 nodes. 
Two relay outputs (available on the optional card) for alarms signalling.
Easy navigation on the programming Menu by three buttons on the frontal panel.
Quick configuration of the alarm thresholds by the 

Quick Alarms Menu

Display contrast settable.

Very Low Frequency Mode

 (VLF) automatically set if fmax 

£ 

1 Hz.

1. GENERAL SPECIFICATIONS

2. TECHNICAL SPECIFICATIONS

Analog Output:

Digital Input: 

Absorbed Current: 
V

MAX

:

 

Sensors Power Supply: 
Frequency Range: 
Frequency Resolution:

Power Supply:

Generated Current: 0 - 20 mA, max load resistance: 500 

W

.

Voltage: 0 - 10 V, min load resistance: 1 k

W.

Configurable Start and Full scale values. 
Resolution: 2 

m

A / 1 mV.

-Reed
-npn  2 wires
-npn 24 V (3 wires)
-pnp 24 V (3 wires)
-NAMUR
-Photoelectric
-Hall
-24 V Input
-TTL
-Variable Reluctance 
Max 7 mA
28 V

DC

17 V

DC

0.00015 Hz - 10 kHz
< 0.05 %

Code S311D-XX-L: 10-40 V

DC

, 19-28 V

AC

 50-60 Hz, max 3 W.

Code S311D-XX-H: 85-265 V

AC

 50-60 Hz, max 3 W. 

EN

3. FUNCTIONING DESCRIPTION 

The digital input frequency measurement or the totalizer value is translated into an analog or 
digital output signal.
The frequency value or as an alternative the totalizer value is displayed; on the 11 (4+7) digits 
model, both the values are simultaneously displayed (4 digits: frequency value, 7 digits: 
totalizer value). The values are also available via Modbus RTU protocol upon query by RS485 
bus (by the optional card).

3.1 Setting Modalities 

All the parameters of the instrument may be set by the

 Programming Menu

 or RS485 (by the 

optional card). The alarms thresholds may be quickly set by the 

Quick Alarm Menu

. Besides 

the Z-NET3 software has been developed for the programming and the configuration of the 
module (consult the web site www.seneca.it).

Environmental Conditions:

Isolation:

Connections:

Protection:
Dimensions (L x W x H)
Standards:

Temperature: -10 - +60°C
Humidity min: 30%, max 90% at 40°C non condensing.
Storage Temperature: -20 - +85 °C.

1500 V

AC

 

among each pair of ports (included the optional 

card ports).

-Removable screw terminals, 3.5 mm / 5.08 mm pitch .
-Three buttons for menu navigation.
IP65 (on the frontal with the apposite furnished seal).
98.2 x 88.5 x 48 mm
EN61000-6-4/2002-10 (electromagnetic emission, industrial 
environment).
EN61000-6-2/2006-10 (electromagnetic immunity, industrial 
environment).
EN61010-1/2001 (safety).
All circuits must be isolated from the other circuits under 
dangerous voltage with double isolation. The power supply 
transformer must comply with EN60742: “Isolated 
transformers and safety transformers”.

Digital Output :

Error  of Voltage / Current 
output (referred to max 
measuring range):

Type: Open Collector, Imax: 50 mA, Vmax: 30 V. 

Calibration Error: 0.1 %
Thermal Coefficient: 0.01%/°K
Linearity error: 0.05 %
EMI (electromagnetic disturbance): < 1 %.

Auxiliary digital input :

Opto isolated, Vmin: 10 V, Vmax: 30 V (available only by the 
optional board).

Response Time:

5 ms.

Relay output:

Capacity: 8 A / 250 V

AC

 (available only by the optional board).

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ENGLISH - 2/20

The instrument allows the following retransmission modalities: 

Analog Output

:

 

The digital input frequency measurement is translated into an analog output 

signal (voltage or current).  

3.2 Retransmission Modalities 

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3.3 Alarms on the frequency measurement (by optional board)

Two alarms may be activated on the digital input frequency measurement. Each alarm may be 
set on the following way: 
1) Alarm on the minimum thershold.         2) Alarm on the maximum thershold.
3) Retained

 

Alarm on the minimum threshold (the reset is not automatic). 

4) Retained Alarm on the maximum threshold (the reset is not automatic). 
For each alarm, it is possible to set Threshold and Hysteresys. If the alarm is set as high, the 
alarm will turn OFF when the input value is Threshold-Hysteresys; instead if the alarm is set as 
low, the alarm condition will end if the input value is ThHysteresys. The alarms status 
is displayed by two leds on the frontal panel and by the relays (in case of optional card use). 
The relays toggle at the alarm condition and return to the initial status at the end of the alarm 
condition or at the reset (if retained). The retained alarms are reset by pressing the buttons 

UP 

+

 OK/MENÙ 

for some seconds (on normal view functioning)

.

3.4 Totalizer

As an alternative to the digital input frequency measurement, it is possible to display the 
totalizer  value (saved on non-volatile memory). On the 11 digits (4+7) indicators both the 
values are simultaneously available.
The totalizer may be:
-UP-counter: it is increased of a unit at each rising edge of the digital input.
-DOWN-counter: it is decreased of a unit at each rising edge of the digital input.
Once the maximum or minimum limit has been reached, the counting is reset and starts again.
Besides it is possible to set a 

reducing ratio

 the totalizer value will be divided for; so the 

resulting value will be displayed.
The 

reset

 may be performed on the three following ways: 

-By the auxiliary digital input (if enabled). 
-By the pressure of the three buttons simultaneously for some seconds (if enabled).
-Via Modbus register. 

Digital Output

: The output generates an impulse at every increment / decrement of the 

totalizer

At the raising of the counting frequency (up the 

maximum value above indicated), pulses are lost until an always low output is obtained. The 
output is normally at high logic level.

. An impulse with duration >= ~100 ms is generated. The output follows the totalizer up 

to approximately 4.7 Hz maximum frequency.  

Three 

Functioning Types

 may be set (except for the 11 digits indicators which display both 

the frequency value and the totalized value) which define the view modalities:

1) Type 0: 

both frequency and totalizer value view. 

By pressing the UP button for some seconds the frequency measurement view is 
selected, instead by pressing DOWN for some seconds the totalized value is displayed. 
At the passage to the frequency value the writing 

IST 

appears for some seconds, while 

passing to the totalized value, the writing

 TOT 

appears.

 

2) Type 1

:

 

only frequency measurement view.

3) Type 2

:

 

only totalizer value view.

3.5 Frequency measurement value or totalized value display

3.6 Average and filter on the frequency measurement

It is possible to calculate the frequency measurement average on a settable number of 
samples. 
The mean value is then filtered by a 20 levels exponential filter and so displayed.

3.7 VLF Mode

If the Full scale value (in Hz) of the frequency measurement (

HI-F

) is 

£

 1 Hz the indicator shifts 

to 

Very Low Frequency Mode

 (VLF) where the minimum frequency value detectable is equal to 

0.00015 Hz (1 impulse every 111 minutes).

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ENGLISH - 4/20

POWER SUPPLY: Verify the code on the label applied to the indicator. 

5. ELECTRICAL CONNECTIONS 

RS485-Aux. Dig. Input 

FRONTAL PANEL: BUTTONS / LEDS

REAR SIDE: TERMINALS 

Relay 2

Relay 1

Led 

Led 

2

2 2

2

1

1

1

1

1

1

1

1

1

0

1

6

3

9

5

2

8

4

1

7

Alarm 1

Alarm 1

1

9

8

7

1 2A 2B

6

5

4

3

10

Power Supply

Output

Dig. Input

DOWN

OK/MENÙ

UP

3.7 Password for access to the menu 

4. BUTTONS AND TERMINALS POSITION

Terminals from 11 to 21 are present only in case of optional board use.

It is possible to enable the protection of the

 Programming Menu

 by password.

The 

Quick Alarm Menu

 is instead password free.

3.0 W

10 ÷ 40 V

DC

19 ÷ 28 V

AC

1

2A

Code 

S311D-XX-L

3.0 W

85 ÷ 265 V

AC

1

2B

Code 

S311D-XX-H

Voltage

V V

+

ANALOG OUTPUT

Generated Current 

Ext. Power Supply 

A A

+

5

4

4

4

3

3

+

DIGITAL INPUT

Reed

10

10

-

10

-

S

8

+

8

8

+

7

+

10

8

-

10

7

9

S
+

+

+

10

10

9

9

9

8

10

7

8

S
+

+

10

7

9

-

S

V

V  > 100 mV

pk

pk

+

DIGITAL OUTPUT

+

V V

5

6

4

3

R

R

-

Imax=V/R=50 mA 

I I

Active Output (powered) 

to connect to passive 

inputs. 

 

Unpowered passive 

output to be connected to 

active inputs

.

npn 2 wires npn 24 V (3 wires)

NAMUR

pnp 24 V (3 wires)

Photoelectric

Hall

24 V Input

TTL Input

Variable

Reluctance

The 17 V

DC 

internal power supply for the sensors, is available by 7 (+)  and 10 (-) terminals.

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ENGLISH - 5/20

11

12

13

16

RS485

Relay Output 1 (8 A/250 Vac)

Relay Output 2 (8 A/250 Vac)

N.C.

N.C.

N.A.

N.A.

Com.

Com.

Auxiliary Digital Input:  
Totalizer Reset (external 
power supply)

17

18

D-

D+

+

15

14

24 V 

OPTIONAL BOARD CONNECTIONS 

Example of Totalizer Reset by the auxiliary digital 

input, internally supplied by the module

17

7

10 18

Parameters settable from Menu : 

19

20

21

B

A

GND

6. MENU PARAMETERS

Parameter

Symbol

Parameter Name

Description and setting range

Default 

Value

5477: 

Password 

disabled

Parameters settable from Menu : 

V ext

FUNC

IRES

PASS

C

.

O

.

N

F

.

I

.

n

.

P

t

.

Indicator 

Functioning Type 

Enables the reset 

of the totalizer by 

buttons and 

auxiliary digital 

input

0 = function of frequency measurement and 
totalizer view.
1 = only function of frequency measurement 
value view.
2 = only function of totalizer view. 

0 : Freq. 

and Tot.

0 : 

Enabled

0 = enables the reset of the totalizer from panel 
and auxiliary digital input. 
1 = disables the reset of the totalizer from panel 
and auxiliary digital input. 

Enables the 

Password for the 

access to menu 

Setting a value different from 

5477

, the 

password (always 5477) will be required at the 
start of the menu.

Full Scale Value 

(Hz)

3: npn 

24 V 

(3 wires)

1000 Hz

TYPE

HI-F

Full scale value of the frequency measurement. 
It defines also the frequency value of the digital 
input signal, associated to the display 
maximum value (

HI-D

)

.

 

Default

Value

Description and setting range

Parameter Name

Symbol

Parameter

Input type

1 = Reed
2 = npn 2 wires
3 = npn 24 V (3 wires)
4 = pnp 24 V (3 wires)
5 = NAMUR

6 = Photoelectric
7 = Hall
8 = 24 V Input
9 = TTL Input
10 = Variable Reluctance 

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ENGLISH - 6/20

Selectable Values: 1 - 10.

0 = no filter 
1 - 20 

Filter level

1

3

Full scale value of the frequency measurement. 
It defines also the frequency value of the digital 
input signal, associated to the display 
maximum value (

HI-D

)

.

 

1000 Hz

Decimal Point 

position in 

HI-F

0 = no decimal point (ex: 00009999) 
1 = first digit (ex: 0000999.9)
2 = second digit  (ex: 000099.99)
3 = third digit (ex: 00009.999)
4 = fourth digit (ex: 0000.9999, only for 6 and 8 
digits models)

Parameters settable from Menu : 

Default

Value

Description and setting range

Parameter Name

Parameter

Symbol

Value displayed if the measured frequency is 0. 
Value on the following ranges: 

Start scale of 

frequency 

measurement view

0

Display

Digits Number  Min. Limit

Max. Limit

4

9999

-1999

Full scale of 

frequency 

measurement view

6

999999

-199999

1000

8

99999999

-19999999

11 (4+7)

9999

-1999

0 = no decimal point (ex: 12345678), 
1 = first digit (ex: 1234567.8)   ...      ...  
N display digits-1
11 digits models (4 + 7): max number of decimal 
digits equal to 3. 

Decimal Point 

position on 

frequency 

measurement view

0 = No 

decimal 

point

dPIn

LO-d

HI-d

dp_D

AVI

FILt

S

.

C

.

A

L

.

0 = No 

decimal 

Point

Display

Digits Number  Min. Limit 

Max. Limit 

4

9999

-1999

6

999999

-199999

8

99999999

-19999999

11 (4+7)

9999

-1999

Value displayed if the measured frequency is  

HI-F

. Value on the following ranges: 

Number of samples 

on which the 

frequency average 

is calculated.

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ENGLISH - 7/20

Parameters settable from Menu : 

A

.

L

.

1

. . /  

A

.

L

.

2

. .

Alarm 1 Threshold

Alarm 1 Hysteresys

Display Digits 

Number

8

6

4

11 (4+7)

99999999

999999

9999

9999

Min. Limit 

Max. Limit

-19999999

-199999

-1999

-1999

500

10

10

Default

Value

Description and setting range 

Parameter Name 

Parameter

Symbol

Alarm 2 Threshold

Alarm 2 Hysteresys

1000

0: Al 2 

disabled

Value referred to the displayed frequency value 
(decimal point set by 

dP_d

).

Settable value on the following ranges: 

Alarm 1 Type

 Alarm 2 Type

0 = Alarm disabled 
1 = Alarm on the minimum threshold
2 = Alarm on the maximum threshold 
3 = Retained alarm on the minimum threshold 
(the reset is not automatic) 
4 = Retained alarm on the maximum threshold 
(the reset is not automatic)

0: Al 1 

disabled

Relay Functioning:
0 = normally opened relay  (N.O.). 
1 = normally closed relay (N.C.).

Relay 1: N.O./N.C.

Relay 2: N.O./N.C.

0:  N.O.

0:  N.O.

Alarm 1 parameters: accessible from 

A

.

L

.

1

. . menu and identified by the final index 1. 

Alarm 2 parameters: accessible from 

A

.

L

.

2

. .

 

menu and identified by the final index 2. 

Frequency  Display 

 Value associated to 

the minimum value 

of the output.

Parameter Name

Parameter

Symbol

Parameters settable from Menu : 

Retransmitted 

output type

Frequency  Display 

 Value associated to 

the maximum value 

of the output.

Display Digits 

Number

8

6

4

11 (4+7)

99999999

999999

9999

9999

Min. Limit

 Max. Limit

-19999999

-199999

-1999

-1999

0

Default

Value

Description and setting range 

1000

Limits for the scaling of the retransmitted output. 
Decimal point set by

 

dP_d

Settable values on the following limits: 

1 =  0 - 10 V 

2: 

4 - 20 mA

2 = 4 - 20 mA

3 = 0 - 20 mA

4 = totalizer digital output

SET1

SET2

HYS1

HYS2

typ1

typ2

rLY1
rLY2

LO-T

HI-T

TYPe

O

.

U

.

T

. .

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ENGLISH - 8/20

MODBUS Address

Parameter Name 

Parameter

Symbol

Parameters settable from Menu : 

Serial 

communication 

speed

Parity control type 

Delay on the 

answer 

1

Default

Value

Description and setting range 

0: No 
Delay

Settable values:  from 1 to 255. 

0 = 1200
1 = 2400
2 = 4800 

0 = None              1 = Even                 2 = Odd.

0: None

Number of pauses of 6 characters each to be 
entered between the end of the Rx message 
and the start of the Tx. Settable values:  0..255.

3 = 9600 
4 = 14400 
5 = 19200 

6 = 38400
7 = 57600 

Serial communication speed in baud: 

6: 38400

Parameters settable from Menu : 

Display Contrast 

Parameter Name 

Parameter

Symbol

10

Default

Value

Description and setting range 

Values from 1 (minimum contrast)  to 20 
(maximum).

Totalizer type: 
UP-counter or 

DOWN-counter.

0 = the totalizer increases of a unit at each rising 
edge of the digital input.  
1 =  the totalizer decreases of a unit at each 
rising edge of the digital input.  

0: UP

1 = Overwrite the set values with the default 
values.  

Default Settings 

Parameters settable from Menu : 

Parameter Name 

Parameter

Symbol

Default

Value

Description and setting range 

Totalizer Reducing 

Ratio 

1

It sets the value the totalizer will be divided for.
Admitted Values: 1 - 250.

Decimal point 

position on the 

totalizer view.

0 = no decimal point (ex: 123456) 
1 = first digit (ex: 12345.6)
2 = second digit (ex: 1234.56)
 ....  
N display digits-1. 
11 digits models  (4 + 7): max number of decimal 
digits equal to 6.

0: No 

decimal 

point

By confirming with 

OK/MENÙ

, all the parameters are saved in 

flash memory and after some instants the module is reset.

Addr

PAR
DEL

BAUD

CONT

UPDN

DFLT

RATI

DP_T

E

.

X

.

I

.

T

.

T

.

O

.

t

. .

S

.

Y

.

S

. .

b

.

U

.

S

. .

ENGLISH - 13/20

MI001503-E

11. ORDER CODES

Code

Model
Display

Power Supply

Options

Description

S311D

Indicator - totalizer with universal digital input.

-4

4 digits
6 digits
8 digits
4+7 digits
85..265 V

AC

10..40 V

DC 

/ 19..28 V

AC

Optional card: RS485 ModBus Port, 2 relay alarms and 
auxiliary digital input. 
Isolation: 1500 V

AC 

among each port

Calibration and configuration Service.

-6
-8
-11

-H
-L

-O

/T

9. SUMMARY OF BUTTONS ACTIONS (in view mode)

Access to Programming 
Menu

Access to Quick Alarms Menu

Retained Alarms reset.

Totalizer Reset (if this functionality has been 
enabled by setting 

IRES

=0).

By pressing the button for some 
seconds and

 

if 

FuNC

=0 has been set, 

the indicator switches to the frequency 
view  (except 11 digits model).

On the following table we give a summary of the actions which may be performed during the 
view phase (not programming phase). To effectively execute the actions, it is necessary to 
press the buttons for some seconds.

nnnn

:  Frequency Measurement 

value to display > 

HI-d

 value of the 2.5% or if the frequency 

value > maximum displayable.

The errors are directly viewed through display.
We are going to list all the possible signallings with the correspondent meaning: 

10. ERROR SIGNALLINGS 

EERR

: at the start may signal  an error on the calibration memory. The functioning of the 

module is blocked while the Modbus communication is available (if optional card).

The S311D-XX-L and S311D-XX-H lines indicators have MODBUS 16 bits (words) registers,  
accessible by RS485 serial  communication (available in case of optional card use).

12.1  Supported MODBUS Commands

Code

03 
06
16

Function

Read Holding Registers
Write Single Register
Write Multiple Registers

Description

Reading of word registers up to 16 at a time.
Writing

 of a word register. 

Writing of word registers up to 16 at a time.

12. MODBUS REGISTERS (Optional Card)

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ENGLISH - 14/20

Set the digital input type: 
1 : Reed
2 : npn 2 wires
3*: npn 24 V (3 wires)
4 : pnp 24 V (3 wires)
5 : NAMUR

Description

IND.

R/W

Bit [15:8]: module ID (38 decimal)
Bit [7:0]: external firmware revision 
Register containing the internal code of the 
firmware.
Register for the setting of the input type and of 
the samples number on which the frequency 
average is calculated.

40003

40002

40001

R

R

R/W

REGISTER
MACHINE ID

FW_CODE

TYP_INP/AVI

Bit [15:8]

Bit [7:0]

Set the samples number on which the frequency 
measurement average value will be calculated. 
Admitted Values: 1*-10. 

6 : Photoelectric
7 : Hall Sensor
8 : 24 V Input
9 : TTL Input
10 : Variable reluctance 

HI_D_LONG_MSW

Full Scale value of frequency measurement 
view (Most significant word).

R/W

40004

Bit [15:0]

Set the full scale value of the frequency 
measurement view scale (integer, most significant 
word): display value associated to 

Hi-F

 value 

(40009-10) of the input frequency. The decimal point 
on the set integer value is given by 

dP_d

 (40008).

 

Default: 1000. 
Minimum Value  (depending on the digits number): 
4 Digits: -1999              6 Digits: -199999 
8 Digits: -19999999        11 (4+7) Digits: -1999
Maximum Value  (depending on the digits number): 
4 Digits: 9999              6 Digits: 999999 
8 Digits: 99999999        11 (4+7) Digits: 9999

40005 R/W

HI_D_LONG_LSW

Full Scale value of frequency measurement 
view (Least significant word).

In the table the notation Bit [x:y] indicates all bits from x to y. For example Bit [2:1] indicates 
bit 2 and bit 1, and serves to illustrate the meaning of the various united combinations of 
the values of the two bits. Default values are indicated with the * symbol.

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Most significant Bit 

Least significant bit

Bit Index

Word (16 bits): MODBUS Register 

The 16-bit Holding Registers have the following structure:

12.2  Holding Registers

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ENGLISH - 15/20

LO_D_LONG_MSW

LO_D_LONG_LSW

Start Scale value of frequency measurement 
view (most significant word).

Start Scale value of frequency measurement 
view (Least significant word).

R/W

R/W

40006

40007

Bit [15:0]

Set the start scale value of the frequency 
measurement view scale (integer, most significant 
word): display value associated to a null input 
frequency. The decimal point on the set integer 
value is given by 

dP_d

 (40008).

 

Default: 0

The limits are the same of 

HI_D_LONG

 

(40004-5)

.

Decimal point position on the view of the frequency 
measurement (

dp_D):

0* = no decimal point (ex: 12345678) , 
1 = first digit (ex: 1234567.8), 2 = second digit
 .....
N display digits-1.
11 digits (4+7): maximum number of decimal digits 
equal to 3.
Decimal point position on 

Hi-F

 parameter (40009-

10)  (

dp_IN

):

0* = no decimal point (ex: 12345678) , 
1 = first digit (ex: 1234567.8), 2 = second digit
 .....
Maximum number of decimal digits depending on 
the display digits number: 
4 digits: 3, 6 digits: 4, 8 digits: 4, 11 digits (3+7): 3

Not used.

Bit [3:0]

Bit [7:4]

Decimal point position on the totalizer view 
(

dp_TOT

):

 

0* = no decimal point (ex: 12345678) 
1 = first digit (ex 1234567.8), 2 = second digit
 .....
N display digits-1. 
11 (4+7) digits indicators: maximum number of 
decimal digits equal to 6. 

DP_D/DP_IN/DP_TOT

Decimal point position on the frequency, HI-F 
parameter and totalizer values. 

R/W

40008

Bit [11:8]

Bit [15:12]

Full scale of frequency measurement in Hz (integer, 
most significant word): associated to the view 
frequency full scale 

HI_D_LONG

 (40004-5). The 

decimal point on the set integer value is decided by 

dP_IN (

40008). Default: 1000. The maximum and 

minimum limits are the same of 

HI_D_LONG

 

(40004-5).

Bit [15:8]

HI-F_LONG_MSW

Full scale of frequency measurement in Hz 
(Most significant Word).

R/W

40009

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ENGLISH - 16/20

SET1_LONG_MSW

SET2_LONG_MSW

SET1_LONG_LSW

SET2_LONG_LSW

Alarm 1 Threshold (most significant word).

Alarm 2 Threshold (most significant word).

Alarm 1 Threshold (least significant word).

Alarm 2 Threshold (least significant word).

R/W

R/W

R/W

R/W

40011

40015

40012

40016

Bit [15:0]

Bit [15:0]

Alarm 1 threshold: value referred to the frequency 
view scale but without decimal point. 
For example if the value referred to the view scale is 
20,0 set 200. 
See 

HI_D_LONG 

(40004-5) for the maximum and 

minimum limits of the parameter 

Default: 500. 

Alarm 1 threshold: value referred to the frequency 
view scale but without decimal point. 
For example if the value referred to the view scale is 
20,0 set 200. 
See 

HI_D_LONG 

(40004-5) for the maximum and 

minimum limits of the parameter. Default: 1000. 

HI-F_LONG_LSW

Full scale of frequency measurement in Hz 
(Least significant Word).

R/W

40010

HYS1_LONG_MSW

HYS2_LONG_MSW

Alarm 1 Hysteresis (most significant word).

Alarm 2 Hysteresis (most significant word).

R/W

R/W

40013

40017

Bit [15:0]

Bit [15:0]

Alarm 1 hysteresis. Value referred to the frequency 
view scale but without decimal point.  For example if 
the value referred to the view scale is 10,00 set  
1000. 
See 

HI_D_LONG 

(40004-5) for the maximum and 

minimum limits of the parameter. Default: 10. 

Alarm 2 hysteresis. Value referred to the frequency 
view scale but without decimal point.  For example if 
the value referred to the view scale is 10,00 set  
1000. 
See 

HI_D_LONG 

(40004-5) for the maximum and 

minimum limits of the parameter. Default: 10. 

HYS1_LONG_LSW

HYS2_LONG_LSW

R/W

R/W

40014

40018

Alarm 1 Hysteresis (least significant word).

Alarm 2 Hysteresis (least significant word).

Bit [15:8]

TYP_AL1/TYP_AL2

Setting of alarms functioning.

R/W

40019

Set the Alarm 1 functioning:
0* = Alarm disabled 
1 = Alarm on the minimum threshold
2 = Alarm on the maximum threshold 
3 = Retained alarm on the minimum threshold (reset 
is not automatic) 
4 = Retained alarm on the maximum threshold 
(reset is not automatic) 

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HI_T_LONG_MSW

HI_T_LONG_LSW

Displayed frequency value corresponding to 
the maximum output value (most significant 
value).

Displayed frequency value corresponding to 
the maximum output value (least significant 
value).

R/W

R/W

40020

40021

Bit [15:0]

Displayed frequency value corresponding to 
retransmitted output maximum value. 
Set the value referred to the view scale but without 
decimal point. Example: if the value referred to the 
view scale is 10,0, set 100. 
Default: 1000. 
The maximum and minimum limits are the same of 

HI_D_LONG

 (40004-5).

LO_T_LONG_MSW

Displayed frequency value corresponding to 
the minimum output value (most significant 
value).

R/W

40022

Bit [15:0]

LO_T_LONG_LSW

Displayed frequency value corresponding to 
the minimum output value (least significant 
value).

R/W

40023

Bit [7:0]

Set the Alarm 2 functioning:
0* = Alarm disabled 
1 = Alarm on the minimum threshold
2 = Alarm on the maximum threshold 
3 = Retained alarm on the minimum threshold (reset 
is not automatic) 
4 = Retained alarm on the maximum threshold 
(reset is not automatic) 

Displayed frequency value corresponding to 
retransmitted output minimum value. 
Set the value referred to the view scale but without 
decimal point. Example: if the value referred to the 
view scale is 10,0, set 100. 
Default: 0. 
The maximum and minimum limits are the same of 

HI_D_LONG

 (40004-5).

Bit [7:0]

CONTRAST/RATIO

Register for the setting of the display contrast 
and of the totalizer reducing ratio.

R/W

40024

Bit [15:8]

Set the value the totalizer will be divided for. 
Admitted values: 1 - 250.
Default: 1.

Set the display contrast: values from 1 (minimum 
contrast) to 20 (maximum contrast). Default: 10

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UP_DOWN/TYP_OUT/
FILT

RLY1_AL1/RLY2_AL2

Setting of  Totalizer (UP or DOWN-counter), 
retransmitted output type, Filter. 

Sets the normal status of relay outputs 1 and 2 
(if optional board).

R/W

R/W

40028

40027

Bit [15:12]

Bit [15:8]

Bit [7:0]

Bit [15:8]

BAUDR / DELAY

Register for the baud rate and the answer 
delay time setting.  

R/W

40030

00000000 (0x00): 1200    
00000001 (0x01): 2400    
00000010 (0x02): 4800    
00000011 (0x03): 9600

00000100 (0x04):  14400 
00000101 (0x05):  19200 
00000110 (0x06)*:  38400  
00000111 (0x07):    57600 

Serial communication speed in baud:

PASSWORD

Enables / disables the password for the 
access to the Programming Menu.

R/W

40025

Bit [15:0]

By setting a value different from 

5477

, at the start of 

the programming menu, the password will be 
required (always 5477). Default: 5477.

Set the relay 1 functioning (if optional board):
0* = normally opened relay. 
1 = normally closed relay. 
Set the relay 2 functioning (if optional board):
0* = normally opened relay. 
1 = normally closed relay. 

Retransmitted output type: 
1 = 0 - 10 V output
2* = 4 - 20 mA output
3 = 0 - 20 mA output
4 = totalizer impulsive digital output.
Set the filter level.
Admitted Values: 0 = no filter, 1 - 20. Default: 3.

Bit [7:0]

Bit [11:8]

Set the the totalizer as UP-counter or DOWN-
counter:
0*= the totalizer increases of a unit at each rising 
edge of the digital input.
1 = the totalizer decreases of a unit at each rising 
edge of the digital input.

Register for the setting of module address and 
parity control.

ADDR_PAR

R/W

40029

Set the address of the module. Admitted values from 

0x00

 

a 0xFF 

(decimal values on the range 1-255,  

Default: 1).

Bit [15:8]

Set the control parity:
00000000 (0)*:  no parity      (NONE)
00000001 (1):   even parity  (EVEN)
00000010 (2):   odd parity    (ODD)

Bit [7:0]

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ENGLISH - 19/20

R

R

R

R

R

R

R

40041

40043

40045

40042

40044

40046

40047

FREQ_LONG_MSW

TOT_LONG_MSW

FREQ_FLOAT_MSW

FREQ_LONG_LSW

TOT_LONG_LSW

FREQ_FLOAT_LSW

FREQ_SHORT

Displayed value of the frequency measurement 
(Long format, most significant word).

Totalizer value (Long format, most significant 
word).

Frequency Measurement value in Hz (Floating 
Point Format, most significant word).

Displayed value of the frequency measurement 
(Long format, least significant word).

Totalizer value (Long format, least significant 
word).

Frequency Measurement value in Hz (Floating 
Point Format, least significant word).

Bit 1

1

: The events (rising edges of the digital input) occur 

with too high frequency and the instrument 
suspends temporarily the measurement.

STATUS

Errors and alarms Signalling.

R

40048

Bit [15:9]

Not used

Bit 8

1

:

 

Alarm 2 ON.

Bit 7

1

:

 

 Alarm 1 ON.

Bit 6
Bit 5

1

the value to display is 

HI-d

 

of the 2,5 %.

Bit 4
Bit 3

1

:

 

 Failure on totalizer saving.

Bit 2

Response delay time. It represents the number of 
pauses of 6 characters each to be entered between 
the end of the Rx message and the start of the Tx 
message. Default value: 0.

Bit [7:0]

Frequency measurement in 0-10000 scale.

Not used.

Not used.

Not used.

Frequency measurement in 0..10000 scale.
0: if the displayed value 

FREQ_LONG

 (40041-42) is

 

 

equal to 

LO_T_LONG 

(40022-23, frequency 

displayed value corresponding to the retransmitted 
output minimum value).
10000: if the displayed value 

FREQ_LONG

               

(40041-42) is

 

 equal to

 HI_T_LONG 

(40020-21, 

frequency displayed value corresponding to the 
retransmitted output maximum value). 
Limited: 0..+11000.

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ENGLISH - 20/20

-By writing 0xC1A0 (decimal 49568), reset 
command.

Bit [15:0]

Module Reset.

RESET

R/W

40049

Bit 0

1

Calibration

 

Eeprom is damaged

Contact Seneca srl to solve the problem. 

SENECA s.r.l.

Via Germania, 34 - 35127  -  Z.I. CAMIN - PADOVA - ITALY
Tel.  +39.049.8705355 - 8705359  -  Fax +39.049.8706287
e-mail: [email protected]  -  www.seneca.it

THE INTERNATIONAL CERTIFICATION NETWORK

R

ISO9001-2000

This document is property  of SENECA srl. Duplication and reprodution are forbidden, if not authorized. Contents 
of the present documentation refers to products and technologies described in it. All technical data contained in the 
document may be modified without prior notice Content of this documentation is subject to periodical revision.

Disposal of Electrical & Electronic Equipment (Applicable throughout the European Union and 

other European countries with separate collection programs)

This symbol, found on your product or on its packaging, indicates that this product should not be 
treated as household waste when you wish to dispose of it. Instead, it should be handed over to an 
applicable collection point for the recycling of electrical and electronic equipment. By ensuring this 
product is disposed of correctly, you will help prevent potential negative consequences to the 
environment and human health, which could otherwise be caused by inappropriate disposal of this 
product. The recycling of materials will help to conserve natural resources. For more detailed 
information about the recycling of this product, please contact your local city office, waste disposal 
service or the retail store where you purchased this product.

By pressing the button for some 
seconds and

 

if 

FuNC

=0 has been set, 

the indicator switches to the totalizer 
view  (except 11 digits model).

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