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Modbus services
S1A53844 01/2011 39
• The Altivar 212 rejects the request because of an invalid starting address:
• The Altivar 212 rejects the request because of an invalid quantity of registers:
• · The Altivar 212 rejects the request because of an invalid byte count:
Note: Reading values of parameters F870 and F871. Value of parameter F87p can be read by reading the address
187p.
Example for parameter F870:
0870: parameter assignment
1870: parameter value
Request: 01 10 18 71 00 02 04 C4 00 17 70 AC 63
Response: 01 90 03 0C 01
Request: 01 10 18 70 00 03 04 C4 00 17 70 6C 7E
Response: 01 90 03 0C 01
Request: 01 10 18 70 00 02 03 C4 00 17 70 D8 6F
Response: 01 90 03 0C 01