Mitsubishi MELSEC-F FX3U Series User Manual

F-17
4 Programming
4.4 Selection of Type K or J
FX 3U /FX 3UC Series PLC User's Manual - Analog Control Edition
FX3U-4AD-TC-ADP (4-channel Thermocouple 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)
4.4 Selection of Type K or J
Turn on the type J or off the type K selection special auxiliary relay to select the thermocouple type J or K for
TC-ADP.
The thermocouple type will be selected for all the channels at the same time.
To select the thermocouple type, use the following special auxiliary relays:
1. Example of program
4.5 Temperature Measurement
The temperature data input in 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:
The immediate data or the average data (data averaged in accordance with the specified number of
averaging time) will be stored in the above data registers as the temperature measurement data.
→ For a detailed description of the number of 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.
2. Example of program
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 PID instruction.
Special auxiliary relay
Description
1st 2nd 3rd 4th
M8261 M8271 M8281 M8291
Selection of type K or J:
OFF: Type K
ON: Type J
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.
2)To select thermocouple type J for the
2nd adapter :
M8000
M8271
Normally ON
1) To select thermocouple type K for the
1st adapter:
M8001
M8261
Normally OFF
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.

Mitsubishi MELSEC-F FX3U Series Specifications

General

Brand	Mitsubishi
Model	MELSEC-F FX3U Series
Category	Controller
Language	English