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Modbus Commands

2-20

SIMATIC TI505/TI500 MODNIM User Manual

Modbus Function Descriptions (continued)

able 2-4

details the diagnostic codes supported.

able 2-4

Diagnostic Codes Supported

Code

(hex)

Diagnostic Description Is Code

Supported?

00 Return request message Yes

01 Restart communications with the slave Yes

02 Return diagnostics register Yes

03 Change message end character Yes

04 Set slave in Listen Only Mode Yes

0A Clear counters and diagnostics Yes

0B Return message count Yes

0C Return checksum error count Yes

0D Return exception count Yes

0E Return slave message count Yes

0F Return slave no-response count No

10 Return slave NAK count No

11 Return slave busy count No

12 Return character overrun count Yes

13 Return overrun error count No

14 Clear character overrun count Yes

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Siemens SIMATIC TI505 Bedienungsanleitung Seite 51