No | Device/register | Name | Function | |
1 | MW01_0 | CPU error (down) | ON at error state | |
2 | MW01_1 | I/O error | ON at error state | |
3 | MW01_2 | Program error Clock/calendar | ON at error state | |
4 | MW01_5 | error(alarm) Retentive data | ON when clock/calendar data is illegal | |
5 | MW01_6 | loss/invalid(alarm) System | ON when retentive data in RAM are invalid | |
6 | MW01_11 | Watchdog error (down) I/O | ON at error state | |
7 | MW01_13 | mismatch (down) | ON at error state | |
8 | MW01_14 | Analog Power Fail I/O | ON at error state | |
9 | MW01_15 | BCC error (down) | ON at error state | |
10 | MW02_1 | Scan time over (alarm) | ON when the scan time exceeds 200 ms | |
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|
ROM Errors:
If the PLC does not have a program ( Firmware / Application / Ladder ) it remains in the wait loop as given in the Flow Chart. The LEDs are used to indicate these conditions. These errors are not logged in the event history.
No | Condition | Indication | |
1 | No Firmware or Firmware corrupted. | RUN LED and ERR LED blinks at one second interval | |
|
| simultaneously. | |
2 | No Application or Application corrupted. | ERR LED blinks at one second interval. | |
3 | No Ladder or Ladder corrupted. | ERR LED blinks at one second interval. | |
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Diagnosis Registers for Serial and Ethernet Communication channels:
Following system registers and system coils can be used for the control and diagnosis of communication channels:
Register / Coil | Tag Name | Read / Write | Description |
SW0003_14 | COM1 Status | Read only | 0 = Communication Error |
|
|
| 1= Communicating with Master |
SW0003_15 | COM2 Status | Read only | 0 = Communication Error |
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|
| 1= Communicating with Master |
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|
|
SW0003_13 | COM3 Status | Read only | 0 = Communication Error |
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|
| 1= Communicating with Master |
SW0018 | COM1 failed node | Read/write | Shows time in sec recover the communication |
| reconnect time (Sec) |
| with failed nodes for port1.the default value is |
|
|
| 60Sec |
SW0019 | COM2 failed node | Read/write | Shows time in sec recover the communication |
| reconnect time (Sec) |
| with failed nodes for port1.the default value is |
|
|
| 60Sec |
SW0022 | COM3 failed node | Read/Write | Shows time in sec recover the communication |
| reconnect time (Sec) |
| with failed nodes for port3.the default value is |
|
|
| 60Sec |
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|
|
|
S0021 | COM1 failed node | Read/write | If this bit is set communication with the failed |
| reconnect control |
| nodes is detected after scan time SW0018 for |
|
|
| port1.By default : ON |
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