Mitsubishi Electric 800 Series Instruction Manual (Function page 427

*6 The item in the parentheses can be always monitored by the measured value monitor.
*7 Input value is "0" when the PLC function is disabled. PID control is disabled when bit 0 of SD1255 is "0".
*8 The measured value is input via the external terminal set in Pr.610.
• Deviation input
PID action selection
Pr.128 Pr.609
60, 61 —
1010,
4
1011
70, 71 —
1010,
5
1011
1010,
2, 3
1011
*9 CC-Link, CC-Link IE TSN, and CC-Link IE Field Network Basic are available.
*10 Input value is "0" when the PLC function is disabled. PID control is disabled when bit 0 of SD1255 is "0".
*11 The deviation is input via the external terminal set in Pr.609.
 Input/output signals
• Assigning the PID control valid signal (X14) to the input terminal by Pr.178 to Pr.189 (Input terminal function selection)
enables PID control to be performed only when the X14 signal is turned ON. When the X14 signal is OFF, regular inverter
running is performed without PID action. (When the X14 signal is not assigned, PID control is enabled only by setting
Pr.128 ≠ "0".)
• Input signal
Signal Function
X14 PID control valid
X72 PID P control switchover 72
• Output signal
Signal Function
FUP PID upper limit
FDN PID lower limit
PID forward/reverse
RL
rotation output
During PID control
PID
activated
Y48
PID deviation limit
SLEEP PID output interruption
NOTE
• Changing the terminal functions with Pr.178 to Pr.189 and Pr.190 to Pr.196 may affect other functions. Set parameters after
confirming the function of each terminal.
 PID automatic switchover control (Pr.127)
• The system can be started up more quickly by starting up without PID control activated.
426
16. (A) Application Parameters
16.4 PID control
Command PU operation
source External operation
Communication PID control disabled ANALOG VALUE 312
PLC function —
External
External terminal
Pr.178 to Pr.189
setting
14
Pr.190 to Pr.196
setting
Positive Negative
logic logic
15 115
14 114
16 116
47 147
48 148
70 170
Network operation
BACnet/IP
—
*11 *11
External terminal
When this signal is assigned to the input terminal, PID control is enabled
when this signal is ON.
Only proportional term is valid when this signal is turned ON. (Integral and
differential values are reset.)
Output when the measured value signal exceeds Pr.131 PID upper limit.
Output when the measured value signal falls below Pr.132 PID lower limit.
"Hi" is output when the output display of the operation panel is forward
rotation (the RUN LED is ON) and "Low" is output when the display is reverse
rotation (the RUN LED blinks) and stop (the RUN LED is OFF).
Turns ON during PID control.
When the PID calculation result is reflected to the output frequency (Pr.128 <
"2000"), the PID signal turns OFF at turn OFF of the start signal.
When the PID calculation result is not reflected to the output frequency
(Pr.128 ≥ "2000"), the PID signal turns ON during PID calculation regardless
of the start signal status.
Output when the absolute deviation value exceeds the limit value set in
Pr.553 PID deviation limit.
Set Pr.575 Output interruption detection time ≠ "9999". This signal turns
ON when the PID output suspension function is activated.
PLC function
Other
*9
communication
Communication (PID
—
deviation)
—
SD1248
*11
—
External terminal
Description
Description
*10