Chapter 13: Troubleshooting
13-4 Error indicators on the display panel
If an error occurs while communicating with the module, the error details can be checked by reading the error code on the display panel (LED display) of the module. Find the cause of the error by looking up the error code that is displayed. Then take the appropriate countermeasures (resetting the param-
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| S0 | ||||
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| S1 |
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| S2 |
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| S3 | ||||
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| S4 |
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| LNK | S0 |
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| S5 | ||||
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| TX | S1 |
| S6 | ||
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| RX | S2 |
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| DC12V | S3 |
| S7 | ||||||
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| TEST | S4 |
| HE | ||
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| S5 |
| PE | |||
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| LN TX RX 12V | T PE HE | LN TX RX 12V T PE HE | PER | S6 |
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| HER | S7 |
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| S7 S6 S5 S4 S3 S2 S1 S0 | S7 S6 S5 S4 S3 S2 S1 S0 |
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| 12V | ||
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| RX | ||||
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| TX |
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| LN |
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| Details |
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| LN |
| LNK | Lit when communicating normally. |
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| TX |
| TX | Lit when sending data. |
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| RX |
| RX | Lit when receiving data. |
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| 12 V |
| 12 VDC | Lit when 12 VDC power is present. (This indicator cannot be used with | ||||||
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| T |
| TEST | Lights while in the test mode. (Is normally OFF.) |
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| PE |
| PER | Lights when the parameter settings are abnormal. |
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| HE |
| HER | Lights when the module has an error. |
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| S0 to S7 |
| S0 to S7 | Displays the node number when it is normal, and an error code when an error occurs. | ||||||
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Error code of LED (S0 to S7)
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| LED name |
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| Error | Error item | Cause (parameter setting status) |
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| S7 | S6 | S5 |
| S4 | S3 | S2 | S1 | S0 | code(H) |
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| O | O | O |
| O | O | O | O | ● | 01 | Node number | Node number is outside the range of 1 |
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| O | O | O |
| O | O | O | ● | O | 02 | Token monitor time | The token monitor time is 0. |
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| O | O | O |
| O | O | ● | O | O | 04 | Not available CU | The host PC is a W70H/100H. |
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| O | O | O |
| O | ● | O | O | O | 08 | Area 1 address | Area 1 is outside the allowed range. |
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| O | ● | O | O | ● | 09 | Area 1 size | Area 1 is larger than 8K bits. |
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| O | O | O |
| O | ● | O | ● | O | 0A | Area 2 address | Area 2 is outside the allowed range. |
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| O | O | O |
| O | ● | O | ● | ● | 0B | Area 2 size | Area 2 is larger than 8K words. |
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| O | O | O |
| O | ● | ● | ● | O | 0E | Area 1 PC address | The top address of area 1 is outside |
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| O | O | O |
| O | ● | ● | ● | ● | 0F | Area 2 PC address | The top address of area 2 is outside |
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| O | O | O |
| ● | O | O | O | O | 10 | Doubled node | The same node number was assigned |
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| number | to more than one node. |
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| O | O | O |
| ● | O | O | O | ● | 11 | Doubled common | This node's transmission area 1 (or |
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| memory address | 2) is used by another node. | * | |||||||||||
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| O | O | ● |
| O | O | O | O | O | 20 | Range of area 1 | * |
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| O | O | O | O | ● | 21 | Range of area 2 | When the JW20H and |
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| series) is used for a PC, any area is set | ||
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| O | O | ● |
| O | O | O | ● | O | 22 | Range of each table | ||||
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| for file 1 though there is no file 1. |
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| O | O | ● |
| O | O | O | ● | ● | 23 | Rang e of the |
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| transmission buffer. |
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| ●: Light, ○: Light off |
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| * Related to the cyclic transfer |
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