Mitsubishi Electric 800 Series Instruction Manual page 289

 Assigning a different action for each MRS signal input via
communication and external terminal (Pr.17 = "4 or 5")
• When Pr.17 = "4 or 5", the MRS signal input from an external terminal is normally closed (NC contact), and the MRS signal
input from communication is normally open (NO contact). This function is useful to perform operation via communication
while keeping the ON state of the MRS signal input from the external terminal.
External MRS
OFF
OFF
ON
ON
 Operation when PU operation interlock enabled (Pr.79 = "7")
• When the X12 signal is not assigned to any input terminal while the PU operation interlock is enabled (Pr.79 = "7"), the
MRS signal is used as the X12 signal. The logic for the MRS signal used as the X12 signal is changed by the Pr.17 setting.
• The operation when the PU operation interlock is enabled (Pr.79 = "7") is as follows.
Pr.17 setting
Assigned
0, 1 Not assigned
Assigned
Assigned
2 to 5 Not assigned
Assigned
NOTE
• When using an external terminal to input the MRS signal, the MRS signal shuts off the output in any of the operation modes.
• The MRS signal is valid regardless of whether it is input through the external terminal or via network, but when the MRS signal
is used as the Inverter run enable (X10) signal, input the signal through the external terminal.
• When the terminal assignment is changed using Pr.178 to Pr.189 (Input terminal function selection), wiring may be
mistaken due to different terminal name and signal contents, or may affect other functions. Set parameters after confirming
the function of each terminal.
Parameters referred to
Pr.79 Operation mode selectionpage 174
Pr.178 to Pr.189 (Input terminal function
288
12. (T) Multi-Function Input Terminal Parameters
12.7 Inverter output shutoff
Communication MRS
OFF Operation enabled
ON Output shutoff
OFF Output shutoff
ON Output shutoff
MRS signal X12 signal
Not assigned
Assigned
Assigned
Not assigned
Assigned
Assigned
selection)page 283
Pr.17 setting
0, 1 2, 3
Output shutoff
Output shutoff
Output shutoff
Operation enabled
MRS function
PU operation interlock (NO contact) —
—
Output shutoff (NO contact)
PU operation interlock (NC contact) —
—
Output shutoff (NC contact)
4, 5
Output shutoff
Output shutoff
Operation enabled
Output shutoff
X12 function
PU operation interlock (NO contact)
PU operation interlock (NO contact)