Publication 1747-RM001G-EN-P - November 2008
12-42 SLC Communication Instructions
19H Improperly formatted Logical ASCII Address string. String not properly terminated with a NULL character or the string
length does not match the value in the length parameter.
20H Target Node responded with: Host has a problem and will not communicate.
30H Target Node responded with: Remote station host is not there, disconnected, or shutdown.
37H Message timed out in local processor.
38H Message disabled pending link response.
40H Target Node responded with: Host could not complete function due to hardware fault.
45h Parameters of a reply to a MSG command do not match what was expected.
50H Target node is out of memory.
60H Target node cannot respond because file is protected.
70H Target Node responded with: Processor is in Program Mode.
80H Target Node responded with: Compatibility mode file missing or communication zone problem.
81H Modbus Error 1: Illegal Function. The function code sent by the Master is not supported by the slave or has an incorrect
parameter.
82H Modbus Error 2: Illegal Data Address. The data address referenced in the Master command does not exist in the slave, or
access to that address is not allowed.
83H Modbus Error 3: Illegal Data Value. The data value being written is not allowed, either because it is out of range, or
because it is being written to a read-only address.
84H Modbus Error 4: Slave Device Failure. An irrecoverable error occurred while the slave was attempting to perform the
requested action.
85H Modbus Error 5: Acknowledge. The slave has accepted the request, but a long duration of time will be required to process
the request.
86H Modbus Error 6: Slave Device Busy. The slave is currently processing a long-duration command.
87H Modbus Error 7: Negative Acknowledge. The slave cannot perform the program function received in the command.
88H Modbus Error 8: Memory Parity Error. The slave attempted to read extended memory, but detected a parity error in the
memory.
89H Modbus Error: Non-standard reply. An error code greater than 8 was returned by the slave.
90H Target Node responded with: Remote station cannot buffer command.
B0H Target Node responded with: Remote station problem due to download.
C0H Target Node responded with: Cannot execute command due to active IPBs.
D0H No IP address configured for the network, -or-
Bad command - unsolicited message error, -or-
Bad address - unsolicited message error, -or-
No privilege - unsolicited message error, -or-
Multihop messaging cannot route request.
D1H Maximum connections used - no connections available
D2H Invalid internet address or host name
D3H No such host
D4H Cannot communicate with the name server
D5H Connection not completed before user-specified timeout
Table 12.17 MSG Instruction Error Codes (Continued)
Error Code Description of Error Condition
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