Mitsubishi FX3U-4AD User Manual page 361

FX /FX /FX PLC User's Manual - Analog Control Edition
3G 3U 3UC
FX -4AD-PTW-ADP (4-channel Platinum Resistance Thermometer Data Input)
3U
4.6 Error Status
If an error is detected in the PTW-ADP, the error status data will be stored in the corresponding special data
register.
The following table shows the special data registers that store the error status data:
• FX , FX Series PLC
3U 3UC
1st
D8268
• FX Series PLC
3G
Special data register
1st
D8288
Check the ON/OFF status of each bit of the error status data register to determine the error. Errors are
assigned to the bits as shown in the following table. Create a program to detect errors.
Bit
The temperature measurement data
b0 of channel 1 is outside the specified
range, or disconnection is detected.
The temperature measurement data
b1 of channel 2 is outside the specified
range, or disconnection is detected.
The temperature measurement data
b2 of channel 3 is outside the specified
range, or disconnection is detected.
The temperature measurement data
b3 of channel 4 is outside the specified
range, or disconnection is detected.
b4 EEPROM error
1. Caution regarding use of error status data
If a PTW-ADP hardware error (b6) or PTW-ADP communication data error (b7) is detected, it is necessary to
clear the error status with a program at the next power-on of the PLC.
For this reason, be sure to create the following program:
• For FX , FX
3G 3U
M8000
Normally
ON
M8002
Initial pulse
*1. "1st " for the FX
Special data register
2nd 3rd
D8278 D8288
2nd
D8298 Stores the error status data.
Description
, FX Series PLC
3UC
D8288
MOV
RST
RST
K4M0
MOV
PLC.
3G
4th
D8298 Stores the error status data.
Description
Bit
b5 Averaging time setting error
b6 PTW-ADP hardware error
b7 PTW-ADP communication data error
b8 to b15 Unused
-
K4M0
*1
Error status of 3rd
M6
b6 = OFF (hardware error)
Error status of 3rd
M7
b7 = OFF (communication data error)
D8288
4 Programming
4.6 Error Status
Description
Description
-
analog special adapter
*1
analog special adapter
A
B
C
D
E
F
G
H
I
J
I-21