Mitsubishi MELSEC iQ-F Series Error 1921H: IP address writing/clear request simultaneous detection

Mitsubishi MELSEC iQ-F Series · taken from the manufacturer’s manual, pages cited

Error code1921H

Write and clear requests (MB492 and SM8495) were activated simultaneously, which is not permitted. The manual's first action is: “Verify that write request and clear request (SM8492 and MS8495) do not turn from OFF to ON simultaneously.”

Model
Mitsubishi MELSEC iQ-F Series
Display shows
IP address writing/clear request simultaneous detection (1921H)
Type
Error code
Source
Manual p. 274

What 1921H means

IP address writing/clear request simultaneous detection p. 275

Common causes

  • Write request and clear request (MB492 and SM8495) turned from OFF to ON simultaneously. p. 275

What to do

  1. Verify that write request and clear request (SM8492 and MS8495) do not turn from OFF to ON simultaneously. p. 275

If 1921H is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Mitsubishi service.

Open the manual at page 274 All MELSEC iQ-F Series error codes Manual details & download

This page summarises what the manufacturer’s manual says about 1921H; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Mitsubishi. Found a mistake? Report an error.