Troubleshooting with the DeviceNet Unit Indicators

Section 9-1

CIO Area Flags Allocated to DeviceNet Unit

Bits 00 and 04 of n+10 (the Unit Error Flag and Unit Memory Error Flag) will be ON.

Correction

Replace the Unit if the error recurs.

CPU Unit Exchange Errors

Unit Number duplication

7-segment

MS indicator

 

NS indicator

Error log (Hex)

 

 

 

 

 

H1

Red (flashing)

OFF

 

---

 

 

 

 

 

Likely Cause

The unit number is duplicated on another Unit.

DeviceNet Unit Response

Stops operation.

Correction

Set the unit numbers correctly and restart the DeviceNet Units.

CPU Unit Faulty (H2)

7-segment

MS indicator

 

NS indicator

Error log (Hex)

 

 

 

 

 

H2

Red (flashing)

OFF

 

---

 

 

 

 

 

DeviceNet Unit Faulty

Node Address Setting Error

Communications Speed Setting Error

DeviceNet Unit Response

Stops operation.

Correction

Replace the CPU Unit if the error recurs when the CPU Unit is restarted.

7-segment

MS indicator

 

NS indicator

Error log (Hex)

 

 

 

 

 

H3

Red (lit)

OFF

 

---

 

 

 

 

 

DeviceNet Unit Response

Stops operation.

Correction

Replace the DeviceNet Unit if the same error recurs when the Unit is mounted to another CPU Unit.

7-segment

MS indicator

 

NS indicator

Error log (Hex)

 

 

 

 

 

H4

Red (flashing)

OFF

 

---

Likely Cause

The node address set on the rotary switches is out-of-range (64 or higher.)

DeviceNet Unit Response

Stops operation.

Correction

Set the node address correctly and restart the DeviceNet Units.

7-segment

MS indicator

 

NS indicator

Error log (Hex)

 

 

 

 

 

H5

Red (flashing)

OFF

 

---

Likely Cause

The communications speed is set incorrectly.

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Omron CJ1W-DRM21, CS1W-DRM21 operation manual CPU Unit Exchange Errors, Unit Number duplication, CPU Unit Faulty H2