9.2 Details of Function Codes
9-111
Chap. 9 FUNCTION CODES
Remote command SV (J02)
J02 sets the source that specifies the command value (SV) under PID control.
Data for J02 Function
0
Keypad
Using the
/ keys on the keypad in conjunction with PID display
coefficients (specified by E40 and E41), you can specify 0 to 100% of the PID
command in an easy-to-understand converted command format. For details of
operation, refer to Chapter 3 "OPERATION USING THE KEYPAD."
1
PID process command 1 (Built-in potentiometer, Terminals [12] and [C1])
In addition to J02 setting, it is necessary to select PID command 1 for analog
input (specified by any of E60, E61 and E62, function code data = 3). For
details, refer to the descriptions of E60 to E62.
3
Terminal command UP/DOWN
Using the UP or DOWN command in conjunction with PID display
coefficients (specified by E40 and E41), you can specify 0 to 100% of the PID
command in an easy-to-understand converted command format.
In addition to J02 setting, it is necessary to assign UP and DOWN commands
to any of terminals [X1] through [X3] with E01 through E03 (function code
data = 17, 18). For details of UP/DOWN operation, refer to the assignment of
the UP and DOWN commands.
4
Command via communications link
Use function code S13 that specifies the communications-linked PID
command. The transmission data of 20000 (decimal) is equal to 100%
(maximum frequency) of the PID command. For details of the
communications format, refer to the RS-485 Communication User's Manual
(MEH448).
• Other than the remote command selection by J02, the multistep frequency (C08 =
4) specified by SS4 and SS8 terminal commands can also be selected as a preset
value for the PID command.
Calculate the setting data of the PID command using the expression below.
PID command data (%) = (Preset multistep frequency) ÷ (Maximum frequency)
× 100
Data Setting Range of PID Command (Only applicable to an analog input)
To select an analog input as a PID command, define the setting range of the PID command.
As with frequency setting, it is possible to arbitrary map the relationship between the
command and the analog input value by adjusting the gain and bias.
For details, refer to the descriptions of C32, C34, C37, C39, C51 and C52.
(Example) Mapping the range of 1 through 5 V at terminal [12] to 0 through 100%
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