9 Troubleshooting and Maintenance
9-42
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Event name
Tfs (Send Finished Monitoring Time) Exceeded
Event code
64A0 0000 hex
Meaning
The time required to complete a send operation exceeded the Send Finished Monitoring Time.
Source
PLC Function Module
Source details
CJ-series Unit
Detection
timing
After serial com-
munications start
Error attributes
Level
Observation
Recovery
---
Log category
System
Effects
User program
Continues.
Operation
Not affected.
System-defined
variables
Variable
Data type
Name
None
---
---
Cause and
correction
Assumed cause
Correction
Prevention
Noise
Implement noise countermeasures.
Use the Unit away from sources of
noise. Implement noise countermea-
sures.
The monitor time is shorter than the
actual completion time.
Adjust the monitor time to match the
actual completion time.
Adjust the monitor time to match the
actual completion time.
Attached
information
Attached information 1: Port number where error was detected
Precautions/
Remarks
None
Event name
Tfr (Receive Finished Monitoring Time) Exceeded
Event code
64A1 0000 hex
Meaning
The time required to complete a reception operation exceeded the Receive Finished Monitoring Time.
Source
PLC Function Module
Source details
CJ-series Unit
Detection
timing
After serial com-
munications start
Error attributes
Level
Observation
Recovery
---
Log category
System
Effects
User program
Continues.
Operation
Not affected.
System-defined
variables
Variable
Data type
Name
None
---
---
Cause and
correction
Assumed cause
Correction
Prevention
Noise
Implement noise countermeasures.
Use the Unit away from sources of
noise. Implement noise countermea-
sures.
The monitoring time is shorter than
the actual completion time.
Adjust the monitoring time to match
the actual completion time.
Adjust the monitoring time to match
the actual completion time.
Attached
information
Attached information 1: Port number where error was detected
Precautions/
Remarks
None