Program Check; Error Status Check - Mitsubishi MELSEC-F FX3U Series User Manual

FX /FX Series PLC User's Manual - Analog Control Edition
3U 3UC
FX -4AD-TC-ADP (4-channel Thermocouple Data Input)
3U
5.4

Program Check

Check the following items for a program:
1. Cancellation of error status at power-on
When the power is turned off and then on again, the error status should be cleared (the b6 and the b7 should
be turned off) using the program.
2. Check of storage devices
Check that different digital values are not stored in the same device in the other programs.
5.5

Error Status Check

If an error occurs on TC-ADP, the corresponding bit will be turned on.
Bit
The temperature measurement data in
b0 channel 1 is outside the specified
range, or disconnection is detected.
The temperature measurement data in
b1 channel 2 is outside the specified
range, or disconnection is detected.
The temperature measurement data in
b2 channel 3 is outside the specified
range, or disconnection is detected.
The temperature measurement data in
b3 channel 4 is outside the specified
range, or disconnection is detected.
b4 EEPROM error
To solve a problem, refer to the troubleshooting method described below:
1. Temperature measurement out of specified range or disconnection of line (b0 to b3)
1) Description of error
The input temperature measurement value is outside the specified range.
The temperature measurement value of thermocouple type K is not in the range from -110
or the temperature measurement value of thermocouple type J is not in the range from -110
Or the line between TC-ADP and the thermocouple is disconnected.
2) Remedy
Check that the input temperature measurement value is within the specified range.
Also check the wiring condition.
2. EEPROM error (b4)
1) Description of error
The adjustment data set in the EEPROM before delivery from our factory is unreadable or is destroyed.
2) Remedy
Please contact the nearest Mitsubishi Electric distributor office.
3. Number of averaging time setting error (b5)
1) Description of error
The number of averaging time set for one of the channels (channels 1 to 4) is outside the specified range:
1 to 4095.
2) Remedy
Check that the number of averaging time is correctly set for each channel.
Description Bit Description
b5 Number of averaging time setting error
b6 TC-ADP hardware error
b7 TC-ADP communication data error
b8 to b15 Unused
-
5 Troubleshooting
5.4 Program Check
A
B
C
D
E
-
F
° C ° C
to +1010 ,
G
° C ° C
to +610 .
F-23