MODBUS INTERNAL MEMORY MAP ADDRESSES
COMMAND STRUCTURE
Parameter
Setting
1: Modbus Mode
RTU Mode Only
2: Operating Mode
Slave Mode Only
#1
3: Response Time
Maximum = 100mS
(5s for Zero Command)
4: Requests
Maximum = 32 per Second
5: Panel Address
100 to 131 (100=default)
6: Baud Rate
4800, 9600, 19200 (19200=default)
7: Start Bits
1
8: Data bits
8
9: Parity
(Odd=default. None=T700 only)
None, Odd, Even
10: Stop
1, 2 (1=default & T700 only)
11: Flow Control
None
12: Physical Interface
2 Wire RS232, 2 Wire RS485
(2 Wire RS485=Optional on T900)
13: Bit Order
Least significant bit transmitted first
14: Byte Order
Least significant byte transmitted first
15: Inter-byte spacing
Maximum = 1.5 bytes times
(781uS @ 19200 Baud)
16: Inter-packet spacing
Minimum = 3.5 bytes times
(1823uS @ 19200 Baud)
1
1
24V DC
B
A
0V DC
24V DC
Pin 3
Tx
Pin 2 Rx
Pin 5 0V
Screen
B
A
0V DC
Screen
Pin 2 Rx
Pin 3
Tx
Pin 5 0V
RS485 Modbus
Comms Port
Using C2 Port
Modbus 485 Option Selected
RS232 Modbus
Comms Port
Using 9 Way D Connector Port
Modbus 232 Option Selected
RS485 Modbus
Comms Port
RS232 Modbus
Comms Port
Interfacing to the Remote Modbus Port
Tocsin i700 Controller (slave)
Tocsin i700 Controller (slave)
Master DCS/BMS
Master DCS/BMS
Note only the A,B and 0V DC
Connections are Used. 0V DC
between master and slave should be
connected for correct operation and to
prevent damage to both master and
slave systems
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