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7-5
7-2 Message Communications Programming
7-2-1 Inverter Fault Processing
The message communications programming example given here reads and stores the fault data using
explicit messages for fault outputs from the Inverter. If the Inverter has a fault, the remote I/O input’s
Fault Bit (word m bit 0) will turn ON. Be sure to turn OFF the Run Command Bits (word n bits 0 and 1). In
this program example, the fault code is stored in DM 0200.
If commands are interrupted by faults, store the completion code in the DM Area and re-execute the
command. When a fault occurs, check the contents of the fault and take countermeasures referring to
information provided in the SYSDRIVE 3G3FV High-function General-purpose Inverter User’s Manual
(I516).
H Allocations
Bit
Bit
Bit
Bit
Bit
Bit
Bit
03000
00000
00001
00002
03003
03002
00100
Fault Flag
Fault Code Read Flag
IOWR Write Completed Flag
Response Flag
Sending Message Flag
Message Sent Flag
Reset Input Bit
Slave node address (3G3FV Inverter)
DM 2000
DM 2001
DM 2002
DM 2003
DM 2004
Command code 2801
Completion code
Received bytes
Node address, service code; 8E: Read normal, 94: Error
Read data or error code
DM0000
DM 0100
DM 0200
Fault code storage for Inverter fault
Completion code storage for communications errors
Response data storage area
Communications Programs (SYSMAC C200HX/HG/HE PCs) Chapter 7