Mitsubishi Electronics MELSEC-F Manuel D’Utilisation
L-21
4 Programming
4.5 Temperature Measurement
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
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
)
)
4.5
Temperature Measurement
The temperature data input in the TC-ADP will be stored in the special data registers.
The special data registers that store the temperature data are shown in the following table:
• FX
The special data registers that store the temperature data are shown in the following table:
• FX
3U
, FX
3UC
Series PLC
• FX
3G
Series PLC
The immediate data or the average data (data averaged in accordance with the specified averaging time) will
be stored in the above data registers as the temperature measurement data.
be stored in the above data registers as the temperature measurement data.
→ For a detailed description of the averaging time, refer to Section 4.6.
1. Caution regarding temperature measurement
The temperature measurement data are for reading only.
Do not change (rewrite) the current data using the sequence program, indicator, or device monitor of the
programming tool.
Do not change (rewrite) the current data using the sequence program, indicator, or device monitor of the
programming tool.
2. Program Example (For FX
3U
, FX
3UC
Series PLC)
Even if the temperature measurement data is not stored in D100 or D101, data registers D8260 or D8261 can
be directly used in the arithmetic operation instruction or a PID instruction.
be directly used in the arithmetic operation instruction or a PID instruction.
Special data register
Description
1st
2nd
3rd
4th
D8260
D8270
D8280
D8290
Stores the channel-1 temperature measurement data.
D8261
D8271
D8281
D8291
Stores the channel-2 temperature measurement data.
D8262
D8272
D8282
D8292
Stores the channel-3 temperature measurement data.
D8263
D8273
D8283
D8293
Stores the channel-4 temperature measurement data.
Special data register
Description
1st
2nd
D8280
D8290
Stores the channel-1 temperature measurement data.
D8281
D8291
Stores the channel-2 temperature measurement data.
D8282
D8292
Stores the channel-3 temperature measurement data.
D8283
D8293
Stores the channel-4 temperature measurement data.
M8000
Normally
ON
FNC 12
MOV
D8260
D100
FNC 12
MOV
D8261
D101
Stores the channel-1 temperature measurement data
of the 1st analog special adapter in the D100.
Stores the channel-2 temperature measurement data
of the 1st analog special adapter in the D101.