User’s Manual Series TAS-1
FEMA ELECTRÓNICA - Page 12
The R485M board adds Modbus communication capabilities
to the TAS-1 units, for retransmission of visualized data to a
remote element. The board is isolated and is completely
configurable from frontal keypad.
Protocols
ModBus RTU and ModBus ASCII selectable
Bus
RS485 Half Duplex
(EIA-RS485)
shielded twisted pair cable, in line,
closed with terminator
Speed
2400, 4800, 9600, 19200, 38400 bauds
Addresses
from 0 to 99
Distances
1200 meters per BUS segment
4800 meters with repeaters
Isolation
2 KV with inputsignal
3.5 KV with power signal
7.3- MODBUS OUTPUT - R485M OPTION BOARD
↵
↵↵
↵↵
Prot
1
M Asc
Bauds
↵
↵↵
↵↵
↵
↵↵
↵↵
Dir
2
M rtu
1
2400
2
4800
3
9600
4
19200
5
38400
n bit
↵
↵↵
↵↵
1
8 bit
2
7 bit
55 11
- - - - - - IC 485 Menu
↵
↵↵
↵↵
Input IC OFF
t Par
↵
↵↵
↵↵
1
n Par
2
Even
3
Odd
Note2 : The length of all registers is 2 bytes, defined as LSB and MSB.
MSB (Most Significant Byte) is the first to be transmitted
LSB (Least Significant Byte) us the second to be transmitted
7.3.2- ACCEPTED FUNCTIONS
04 Hex
Registry read
(«Input Register» on the standard)
7.3.3- REGISTER MAP
00 00 Hex
Display Value
Type : Integer
Value : from -32768 to 32767
00 01 Hex
Decimal Point Position
Type : Integer
Value : 0, 1, 2, 3 or 4
00 02 Hex
Status
Type : Integer
Word composed of 1+4 bits
b0=0
Value contained on register 00 00H is an indication (number)
b0=1
Value contained on register 00 00H is not an indication
Word b4,b3,b2,b1
0.- Reserved
3.- +Ovr
6.- Con
9.- MErr1
12.- Reserved
15.- Others
1.- Low
4.- DErr0
7.- Open
10.- Reserved
13.- Reserved
2.- -Ovr
5.- Brk
8.- MErro0
11.- Reserved
14.- Reserved
00 03 Hex
Alarms
Type : Integer
b0=0 AL1 in OFF state
b2=0
AL3 in OFF state
b0=1 AL1 in ON state
b2=1
AL3 in ON state
b1=0 AL2 in OFF state
b3=0
AL4 in OFF state
b1=1 AL2 in ON state
b3=1
AL4 in ON state
Note1 : If there is no numeric value on display (but a text value), register
0000Hex offers value 32767 or -32768. And bit b0 of register 0002Hex
show the display status.
0 = no decimal
2 = 2 digits decimal
4=4 digits decimal
1 = 1 digit decimal
3 = 3 digits decimal
5=5 digits decimal
Not Used
b3
b2
b1
b0
Not Used
b4
b3
b2
b1
b0
Introduce te programming code «55 11»
Message «IC 485»
RS485 board recognized
Message «MENU»
Entering the programming menu
Parameter «PROT» Protocol
Select Modbus ASCII or Modbus RTU
Parameter «DIR»
Address
Input instrument address
Parameter «BAUDS» Speed in Bauds
Parameter «n BIT»
Number of Bits
Select 8 or 7 bits per character
Parameter «t PAR»
Parity
«Even» «Odd»
«nPar»
Message «INPUT» .- confirms that the parameters have been
accepted
Message «ERROR» .- informs that at least one of the values
is not correct, and the whole configuration could not be applied.
Repeat the process from the begining.
7.3.1- CONFIGURATION
