Chapter 6. Function Description (I/O)
1.16) Prohibit FWD (Prohibition of Forward Rotation)
1.17) Prohibit REV (Prohibition of Reverse Rotation)
If Prohibit FWD or Prohibit REV is set, it prohibits forward or reverse rotation, respectively. If Prohibit FWD is used,
speed command becomes 0 when it has positive value. Similarly, If Prohibit REV is used, speed command becomes 0
when it has negative value.
(Example)
When multi-function input terminal P1 is set to “prohibit FWD” and P2 to “prohibit REV” the following
diagram will be shown.
1.18) Proc PID Dis (Process PID Disabled)
This function is used to disable the Process PID controller. If Proc PID Enb at the CON_20 is ON and also this terminal
is ON, the output of Process PID controller becomes zero. Otherwise, Process PID controller generates its output
depending on the controller operation. ‘Proc PID Enb’ at CON_20 determines whether this function is used or not. The
setting for this code is as follows.
Code
LCD display
Description
Setting range
Unit
Factory
setting
CON_20
Proc PID Enb
Proc PID contoller
Enable/Disable
Disable
Enable
Terminal
Disable
‘Disable’ at CON_20 blocks the output of Process PID controller and ‘Enable’ at CON_20 enables the Process PID
controller. If ‘Terminal’ is set, the multi-function terminal set to ‘Proc PID Dis’ determines whether the output of
Process PID controller is enabled or not. To prevent the saturation of Process PID controller, Process PID controller is
enabled only if the multi-function input terminal is set to ‘Proc PID Dis’ and its terminal input is OFF and operation
command is ‘ON’. Process PID controller does not work if operation command is not ON or ‘Process PID Disable’ is not
set. Truth table is as follows.
P2
P1
RX
FX
Motor
Speed
TIME
Prohibit FWD
Prohibit REV
ON
OFF
OFF
OFF
ON
ON
OFF
ON
OFF