Rockwell Automation 1758-RTU202 DataSite Hardware User Manual - Manual (Page 52)

Publication 1758-UM001D-EN-P - June 2011
52 Operating the Controller
Assigned Modbus Register
Addresses of I/O Signals
The I/O points of the controller are:
6AI-3HART-8DI-4DO-2AO-3PI-1RS232-1RS232/1RS485-1Ethernet-12VDC
When we read or write those signals, we only need to read or write the
registers as shown in the following table.
Analog Scaling
For 8AI (4…20 mA)
For 6AI (0…10V):
Signal Registers Value range Meaning
6AI 30001…30006 10000…50000 Unsigned short data, standard value,
readable only.
2HART
(2AI) 30007…30008 10000…50000 Unsigned short data, standard value,
readable only.
8DI 10001…10008 1, 0 BOOL data, readable only
3DI (PI) 10009…10011 1, 0 BOOL data, readable only (when you
use PI as DI)
4DO 00001…00004 1, 0 BOOL data, readable or writable
2AO 40001…40002 10000…50000 Unsigned short data, standard value,
readable or writable
3PI 30011…30016 32-bit int Unsigned integer data, readable only
Current Standard value
4.00 mA 10000
8.00 mA 20000
12.00 mA 30000
16.00 mA 40000
20.00 mA 50000
Voltage Standard value
0.000V 10000
2.500V 20000
5.000V 30000
7.500V 40000
10.000V 50000