Mitsubishi MELSEC-F FX3U Series - List of Special Devices; Selection of Temperature Unit

E-15
4 Programming
4.2 List of Special Devices
FX 3U /FX 3UC Series PLC User's Manual - Analog Control Edition
FX 3U -4AD-PT-ADP (4-channel Platinum Resistance Thermometer Data Input)
A
Common Items
B
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3U
-4DA-ADP
E
FX
3U
-4AD-PT
-ADP
F
FX
3U
-4AD-TC
-ADP
G
PID Instruction (FNC 88)
4.2 List of Special Devices
If PT-ADP is connected, special devices will be assigned as shown in the following table:
R: Read / W: Write
4.3 Selection of Temperature Unit
Turn on (Fahrenheit (°F)) or off (centigrade (°C)) the special auxiliary relay of PT-ADP to switch the
temperature unit.
To switch the temperature unit, use the following special auxiliary relays:
1. Example of program
Special
device
Device number
Description
Attribute Reference
1st 2nd 3rd 4th
Special
auxiliary
relay
M8260 M8270 M8280 M8290 Selects the temperature unit. R/W
Section
4.3
M8261 to
M8269
M8271 to
M8279
M8281 to
M8289
M8291 to
M8299
Unused (Do not use.) - -
Special
data
register
D8260 D8270 D8280 D8290
Channel-1 temperature
measurement data
R
Section
4.4
D8261 D8271 D8281 D8291
Channel-2 temperature
measurement data
R
D8262 D8272 D8282 D8292
Channel-3 temperature
measurement data
R
D8263 D8273 D8283 D8293
Channel-4 temperature
measurement data
R
D8264 D8274 D8284 D8294
Number of averaging time for
channel 1 (Setting range: 1 to 4095)
R/W
Section
4.5
D8265 D8275 D8285 D8295
Number of averaging time for
channel 2 (Setting range: 1 to 4095)
R/W
D8266 D8276 D8286 D8296
Number of averaging time for
channel 3 (Setting range: 1 to 4095)
R/W
D8267 D8277 D8287 D8297
Number of averaging time for
channel 4 (Setting range: 1 to 4095)
R/W
D8268 D8278 D8288 D8298 Error status R/W
Section
4.6
D8269 D8279 D8289 D8299 Model code = 20 R
Section
4.7
Special auxiliary relay
Description
1st 2nd 3rd 4th
M8260 M8270 M8280 M8290
Selection of temperature unit:
OFF: Centigrade (°C)
ON: Fahrenheit (°F)
1) To switch the temperature unit to centigrade ( ° C)
for the 1st adapter:
M8001
M8260
Normally OFF
2) To switch the temperature unit to Fahrenheit ( ° F)
for the 2nd adapter:
M8000
M8270
Normally ON