Mitsubishi Electric FX3U-232-BD User Manual page 15

FX Series PLC User's Manual - Data Communication Edition
8. Troubleshooting
8.1 Checking FX PLC Version Applicability .................................................................................... D-86
8.2 Checking Communication Status Based on LED Indication ..................................................... D-86
8.3 Checking Installation and Wiring............................................................................................... D-86
8.4 Checking Sequence Program ................................................................................................... D-86
8.5 Checking Error Codes............................................................................................................... D-88
8.5.1 Error codes when NAK is sent................................................................................................... D-88
8.5.2 Error codes in PLC .................................................................................................................... D-89
9. Related Data
9.1 Related Device List ................................................................................................................... D-90
9.2 Details of Related Devices ........................................................................................................ D-92
9.2.1 Serial communication error [M8063 and M8438]....................................................................... D-92
9.2.2 Communication setting keep [M8120] ....................................................................................... D-92
9.2.3 Global function ON [M8126 and M8426] ................................................................................... D-92
9.2.4 On-demand send processing [M8127 and M8427] ................................................................... D-92
9.2.5 On-demand error flag [M8128 and M8428] ............................................................................... D-93
9.2.6 On-demand data word/byte changeover [M8129 and M8429] .................................................. D-93
9.2.7 Serial communication error code [D8063 and D8438]............................................................... D-93
9.2.8 Communication format setting [D8120 and D8420]................................................................... D-94
9.2.9 Station number settings [D8121 and D8421]............................................................................. D-95
9.2.10 On-demand data head device number specification [D8127 and D8427] ............................... D-96
9.2.11 On-demand data quantity specification [D8128 and D8428] ................................................... D-96
9.2.12 Time-out time setting [D8129 and D8429]............................................................................... D-97
9.2.13 Operation mode display [D8419 and D8439] .......................................................................... D-97
9.3 Communication Setting Method Using Sequence Program...................................................... D-98
9.3.1 Setting procedure ...................................................................................................................... D-98
9.3.2 Caution on communication setting using sequence program.................................................... D-98
9.4 ASCII Code Table ..................................................................................................................... D-99
Table of Contents
D-86
D-90
11