Network Card User Manual

Data Exchange

890USE17700 April 2004 135

List of Supported

Commands

The following table lists the Modbus commands that the STB NIP 2212 supports:

Modbus

Function

Code

Subfunction

or Subindex

Command Valid Range Max. No. of

Words per

Message

3 read holding registers (4x) 1–9999 125

4 read input registers (3x) 1–4697 125

6 write single register (4x) 1–5120 and

9488–9999

8 21 get/clear Ethernet statistics (See

Ethernet Statistics, p. 136)

0–53 N/A

16 write multiple registers (4x) 1–5120 and

9488–9999

100

22 mask write registers (4x) 1–5120 and

9488–9999

23 read/write multiple registers (4x) 1–5120 and

9488–9999

100 (write)

1—9999

(read)

125 (read)