Program Check - Mitsubishi Electric FX3G User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -4AD-TC-ADP (4-channel Thermocouple Data Input)
3U
5.4

Program Check

Check the following items for the 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
turn off) using the program.
2. Check of storage devices
Verify that different values are not being stored in the same device by the other parts of the programs.
5.5 Error Status Check
If an error occurs in the TC-ADP, the corresponding bit will turn on.
The bit which is turned ON due to the error status is held ON until overwritten to OFF by the program or the
power is cycled. If b6 or b7 is turned ON, then it is necessary to clear the error status using the program the
next time the power of the PLC is cycled.
Bit
The temperature measurement data of
b0 channel 1 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
b1 channel 2 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
b2 channel 3 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
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 between -110
° C
+1010 , or the temperature measurement value of thermocouple type J is not in the range between
° C
-110 to +610
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 your local Mitsubishi Electric representative.
3. Averaging time setting error (b5)
1) Description of error
The 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 averaging time is correctly set for each channel.
PLC User's Manual - Analog Control Edition
Description
° C
.
Bit Description
b5 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
K
L
M
-
° C
to
L-31