Omron SYSMAC CP Series, User Manual

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16-3
16 Other Functions
CP2E CPU Unit Software User’s Manual(W614)
1
6
-1 PID T
e
mp
eratu
re
Con
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16
16-1-2 F
lo
w
of Oper
ation
z
Temperature Sensor Unit
• Setting the Temperature Range
Set the temperature range with the rotary switch on the front panel of the Temperature Sensor
Unit. If the rotary switch is set to 1 for a CP1W-TS001 Temperature Sensor Unit, the temperature
range is 0.0 to 500.0°C.
• Temperature Data Storage Format
Temperature data is automatically stored in words in the Input Area allocated to the Temperature
Sensor Unit as an Expansion Unit using four-digit hexadecimal.
Example: 100°C is stored as 0064 hex.
• When the range code is a decimal number to one decimal point, the value is multiplied by a
factor of 10 and converted to a hexadecimal number without a sign, then stored as binary
data.
Example: 500.0°C multiplied by 10 is 5000 decimal. This is converted to 1 388 in hexadecimal
and stored.
• If the temperature is negative, it is stored as signed hexadecimal.
Example: -200°C is stored as FF 38 hex.
z
PIDAT Instruction
The PIDAT instruction treats the PV as unsigned hexadecimal data (0000 to FFFF hex). Signed data
cannot be used, so if the temperature range includes negative values, apply scaling with the APR
instruction.
16-1-2 Flow of Operation
1
Set the temperature range with the rotary switch on
the front panel.
2
• Connect the temperature sensor to the Tempera-
ture Sensor Unit.
• Connect the SSR to the transistor output.
3
Set parameters with the MOV instruction or other
instructions.
4
Execute the PIDAT instruction.
5
Execute autotuning for the PID constants.
6
Start PID control.
Inputting the Temperature Sensor’s PV to PIDAT Instructions
Setting the Temperat u re
Sensor Unit
W iring I/O
Setting PIDAT and TPO
instr
u ctions parameters
Exec u ting the PIDAT instr u ction
A u tot u ning
Starting PID control