FUNCTION CODES
Chap 5
[ 2 ] PID command by analog inputs (J02 = 1)
When any analog input (voltage input to terminals [12] and [C1] (V2 function), or current input to terminal [C1] (C1
function)) for PID command 1 (J02 = 1) is used, it is possible to arbitrary specify the PID command by multiplying
by the gain and adding the bias. The polarity can be selected and the filter time constant and offset can be adjusted.
In addition to J02 setting, it is necessary to select PID process command 1 for analog input (specified by any of
E61 to E63, function code data = 3). For details, refer to the descriptions of E61 to E63.
Table 5.3-21 Adjustable elements of PID command
Input terminal
[12]
0 to +10V,
-10 to +10V
C55 C56 C32 C34 C35 C33 C31
[C1] (C1)
4 to 20mA,
0 to 20mA
C61 C62 C37 C39 C40 C38 C36
[C1] (V2) 0 to +10V C67 C68 C42 C44 C45 C43 C41
■ Offset (C31, C36, C41)
C31, C36 or C41 configure the offset for an analog voltage/current input.
■ Filter (C33, C38, C43)
C33, C38, and C43 provide the filter time constants for the voltage and current of the analog input. The larger the
setting of time constant is, the slower the response is. Specify the proper filter time constant taking into account the
response speed of the machine (load). If an analog input signal fluctuates due to line noises, increase the filter time
constant.
■ Polarity selection for terminal [12] (C35)
C35 configures the input range for analog input voltage of terminal [12].
C35 data Modes for terminal inputs
0 -10 to +10V
1 0 to +10 V(negative value of voltage is regarded as 0 V)
■ Range / polarity selection for terminal [C1] (C1 function) (C40)
C40 configures the input range for analog input current of terminal [C1] (C1 function).
C40 data Range of terminal inputs Handling when a bias value is configured as minus
0 4 to 20 mA (Factory default)
Limits any value lower than 0 to 0.
1 0 to 20 mA
10 4 to 20 mA
Enables any value lower than 0 as minus value.
11 0 to 20 mA
■ Polarity selection for terminal [C1] (V2 function) (C45)
C45 configures the input range for analog input voltage of terminal [C1] (V2 function).
C45 data Modes for terminal inputs When bias is specified to be negative
0 0 to +10V Makes a value lower than 0 effective as a negative value.
1 0 to +10V (factory default) Limits a value lower than 0 to 0.
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