Westermo RM-115S User Manual
Page 52

115S Serial I/O Module
User Manual
Page 52
June 2011
Appendix B. Modbus Functionality
Table B-1 specifies the maximum query and response data parameters for the 115S
modules. See the Gould Modbus Protocol Reference guide (PI-MBUS 300 Rev B) for
more detail.
Function
code
Description
Maximum Data Size
1,2
Read coil / input status
1160 coils / inputs
3
Read holding (output) registers
145 registers
4
Read input registers
145 registers
5
Force single coil
1 coil
6
Set single register
1 register
7
Read exception status
8 coils
8
Loopback test
N/A
9,10
NOT SUPPORTED
NOT SUPPORTED
11
Communications event counter
N/A
12-14
NOT SUPPORTED
NOT SUPPORTED
15
Force multiple coils
1160 coils
16
Set multiple registers
145 registers
17-255
NOT SUPPORTED
NOT SUPPORTED
Table B-1: Supported Modbus functions and limitations for 115S modules.
- TR-36B (88 pages)
- TD-36 (44 pages)
- TR-36 (36 pages)
- TR-36B (20 pages)
- IDW-90 AT (97 pages)
- GD-01 (206 pages)
- GD-01 (20 pages)
- MRI-128-F4G (169 pages)
- MRI-128-F4G (175 pages)
- GDW-11 485 (380 pages)
- GDW-11 (40 pages)
- Lynx Series (28 pages)
- ODW-720-F2 (36 pages)
- ODW-720-F1 (20 pages)
- ODW-720-F1 (24 pages)
- ODW-730-F2 (36 pages)
- ODW-730-F1 (24 pages)
- DDW-120 (24 pages)
- DDW-226-EX (24 pages)
- DDW-226-EX (24 pages)
- DR-270 (28 pages)
- DR Series (460 pages)
- ED-2x0 (20 pages)
- MRD-3x0 (199 pages)
- FD-80 (24 pages)
- FDV-206-1D-1S (24 pages)
- GD-01 US (24 pages)
- LD-01 (8 pages)
- IDW-90 (44 pages)
- Lynx-x10-F2G (16 pages)
- Lynx-x08-F2G-S2 (20 pages)
- MDI-110-F3x (16 pages)
- MR-2x0 (28 pages)
- ODW-642 (28 pages)
- PII PoE Injector (12 pages)
- Viper Series (977 pages)
- SDI-5xx (12 pages)
- RFI-xx (32 pages)
- SDI-8xx (16 pages)
- RFIR-xxx (24 pages)
- TD-29 (16 pages)
- SDW-5xx (24 pages)
- TD-23 (24 pages)
- TD-29P (16 pages)
- Viper 408 (20 pages)