Mitsubishi Electronics MELSEC-F Manuel D’Utilisation

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L-19
4 Programming
4.3 Selection of Temperature Unit
FX
3G
/FX
3U
/FX
3UC
 PLC User's Manual - Analog Control Edition
FX
3U
-4AD-TC-ADP (4-channel Thermocouple Data Input)
K
FX
3U
-4A
D
-P
NK
          
         
-A
D
P
L
FX
3U
-4AD
-TC
        
        
   -
A
D
P
M
PI
D
 In
st
ru
ctio
n
           (F
N
C
 88
)
• FX
3G
 Series PLC
R: Read / W: Write
4.3
Selection of Temperature Unit
The state of special auxiliary relays decides the TC-ADP's temperature unit as shown in the table below.
To switch the temperature unit, use the following special auxiliary relays:
• FX
3U
, FX
3UC
 Series PLC
• FX
3G
 Series PLC
1. Program Example (For FX
3U
, FX
3UC
 Series PLC)
Special device
Device number
Description
Attribute
Refer to
1st
2nd
Special auxiliary relay
M8280
M8290
Selects the temperature unit
R/W
Section 4.3
M8281
M8291
Switches the thermocouple type 
between type K and type J
R/W
Section 4.4
M8282 to 
M8289
M8292 to 
M8299
Unused (Do not use.)
-
-
Special data register
D8280
D8290
Channel-1 temperature measurement 
data
R
Section 4.5
D8281
D8291
Channel-2 temperature measurement 
data
R
D8282
D8292
Channel-3 temperature measurement 
data
R
D8283
D8293
Channel-4 temperature measurement 
data
R
D8284
D8294
Averaging time for channel 1 
(Setting range: 1 to 4095)
R/W
Section 4.6
D8285
D8295
Averaging time for channel 2 
(Setting range: 1 to 4095)
R/W
D8286
D8296
Averaging time for channel 3 
(Setting range: 1 to 4095)
R/W
D8287
D8297
Averaging time for channel 4 
(Setting range: 1 to 4095)
R/W
D8288
D8298
Error status
R/W
Section 4.7
D8289
D8299
Model code = 10
R
Section 4.8
Special auxiliary relay
Description
1st
2nd
3rd
4th
M8260
M8270
M8280
M8290
Selection of temperature unit:
OFF: Centigrade (°C)
ON: Fahrenheit (°F)
Special auxiliary relay
Description
1st
2nd
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