Omron CJ - REFERENCE MANUAL 10-2009 Reference Manual page 697

In this case, set the same value for the PID Control instruction's output range and the TPO(685)
instruction's manipulated variable range. For example, when the PID Control instruction's output range
and the TPO(685) instruction's manipulated variable range are both set to 12 bits (0000 to 0FFF hex),
the duty ratio is calculated by dividing the manipulated variable from the PID Control instruction by
0FFF hex and TPO(685) converts that duty ratio to a time-proportional output.
External Wiring Example
Connect the Transistor Output Unit to a solid state relay (SSR) as shown in the following diagram.
Transistor Output Unit
12 to 24 VDC
COM
Parameter Settings
Control data
Item
Word Bits
C 00 to 03 Manipulated
variable range
04 to 07 Input type
08 to 11 Input read
timing
12 to 15 Output limit
control
C+1 00 to 15 Control period
C +2 00 to 15 Output lower
limit
C +3 00 to 15 Output upper
limit
C+4 00 to 15 Work area
C+5 00 to 15
C+6 00 to 15
Note When the output limit control function is enabled, set the lower and upper limits as follows:
0000 hex lower limit
Execution
• The instruction is executed while the input condition is ON.
• When instruction execution starts, the output bit (R) is turned ON/OFF according to the duty ratio.
• The parameters (in C to C+3) are read in real time each time that the instruction is executed. When
changing the parameters, change all of them at the same time so that different sets of parameters are
not mixed.
CS/CJ/NSJ Series Instructions Reference Manual (W474)
+
Contents
Specifies the number of input data bits.
Specifies whether S contains a duty ratio
or manipulated variable.
Specifies the input read timing.
Specifies whether the output limit function
is enabled or disabled.
Control period
(Time period in which the ON/OFF
changes are made.)
Specifies the lower limit when the output
limit is enabled.
Specifies the upper limit when the output
limit is enabled.
This work area is used by the system. It
cannot be used by the user.
upper limit 2710 hex.
Heater
SSR
AC
Setting range
0 hex: 8 bits 5 hex: 13 bits
1 hex: 9 bits 6 hex: 14 bits
2 hex: 10 bits 7 hex: 15 bits
3 hex: 11 bits 8 hex: 16 bits
4 hex: 12 bits
0 hex: Duty ratio
Setting range for S: 0000 to 2710 hex (0.00 to
100.00%)
1 hex: Manipulated variable
Setting range for S: 0000 to FFFF hex (0 to 65,535)
(The maximum setting depends on the MV range
set with bits 00 to 03 of C.)
0 hex: Use the beginning value of the control period
1 hex: Use lower value
2 hex: Use higher value
3 hex: Continuous adjustment
0 hex: Disabled
1 hex: Enabled (See note.)
0064 to 270F hex (1.00 to 99.99 s)
Note: For example, 1.00 s is set as 0064 hex, and not
0001 hex.
0000 to 2710 hex (0 to 100.00%)
0000 to 2710 hex (0 to 100.00%)
Cannot be used.
3. Instructions
3
Change with
ON input
condition
Allowed
Allowed
Allowed
Allowed
Allowed
Allowed
Allowed
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