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15
G
PREMASGARD
®
121x - Modbus
| Telegrams
Function 04 Read Input Register
Register
Parameter
Data Type
Value
Range
3x0001
Differential
pressure
Without filtering
Signed 16 Bit
– 1000 ... + 1000
– 5000 ... + 5000
– 1000 ... + 1000 Pa
– 5000 ... + 5000 Pa
3x0002
Differential
pressure
1 sec. filtering
Signed 16 Bit
– 1000 ... + 1000
– 5000 ... + 5000
– 1000 ... + 1000 Pa
– 5000 ... + 5000 Pa
3x0003
Differential
pressure
10 sec. filtering
Signed 16 Bit
– 1000 ... + 1000
– 5000 ... + 5000
– 1000 ... + 1000 Pa
– 5000 ... + 5000 Pa
Function 05 Write Single Coil
Register
Parameter
Data Type
Value
Range
0x0001
AutoZero
Bit 0
0 / 1
ON - OFF
Function 08 Diagnostics
The following
sub function codes
are supported
Sub Function
Code
Parameter
Data Type
Answer
00
Echo of transmission data
(Loopback)
Echo data
01
Restart Modbus
(Reset listen-only mode)
Echo telegram
04
Activation listen-only mode
No answer
10
Delete counter
Echo telegram
11
Counter bus telegrams
Unsigned 16 Bit
All valid bus telegrams
12
Counter communication errors
(Parity, CRC, frame errors, etc.)
Unsigned 16 Bit
Faulty bus telegrams
13
Counter exception telegrams
Unsigned 16 Bit
Error counter
14
Counter slave telegrams
Unsigned 16 Bit
Slave telegrams
15
Counter telegrams without answer
Unsigned 16 Bit
Broadcast messages (address 0)
Function 17 Report Slave ID
Composition of answer telegram
Byte No.
Parameter
Data Type
Answer
00
Number of bytes
Unsigned 8 Bit
6
01
Slave ID (device type)
Unsigned 8 Bit
7 =
PREMASGARD
®
1214
(1.5 %)
02
Slave ID (device class)
Unsigned 8 Bit
30 =
PREMASGARD
®
/
PREMASREG
®
03
Status
Unsigned 8 Bit
255 = RUN, 0 = STOP
04
Version number (release)
Unsigned 8 Bit
1...9
05
Version number (version)
Unsigned 8 Bit
1…99
06
Version number (index)
Unsigned 8 Bit
1