Mitsubishi Electric FR-A820-00046 Instruction Manual page 646

(T) Multi-Function Input Terminal Parameters
Assigning a different action for each MRS signal input via communication and external
terminal (Pr. 17 = "4")
When Pr. 17 = "4", the MRS signal from an external terminal can be set as the normally closed (NC con-
tact) input, and the MRS signal from communication as the normally open (NO contact) input. This
function is useful to perform operation by communication with MRS signal from external terminal re-
mained ON.
External MRS
Tab. 5-172: Output shutoff by external terminal or communication
NOTES The MRS signal is assigned to the terminal MRS in the initial status. By setting "24" in either Pr. 178
to Pr. 189 (input terminal function selection), the RT signal can be assigned to the other terminal.
When using an external terminal to input the MRS signal, the MRS signal shuts off the output in
any of the operation modes.
MRS signal is valid from either of communication or external, but when the MRS signals is to be
used as Inverter run enable signal (X10), it is required to input from external.
When the terminal assignment is changed using Pr. 178 to Pr. 189 (input terminal function selec-
tion), the terminal name will be different, which may result in an error of wiring, or affect other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 178 to Pr. 189
5 - 444
Communication MRS
OFF OFF
OFF ON
ON OFF
ON ON
(input terminal function selection)
Pr. 17 setting
0
Operation enabled Output shutoff
Output shutoff Output shutoff
Output shutoff Output shutoff
Output shutoff Operation enabled
Parameters
2 4
Output shutoff
Output shutoff
Operation enabled
Output shutoff
=> page 5-439