Mitsubishi Electric FR-A800, Instruction Manual

Page: 607 / 1042

Parameters (T) Multi-Function Input Terminal Parameters
FR-A800 5 - 427
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 Communication MRS
Pr. 17 setting
0 2 4
OFF OFF Operation enabled Output shutoff Output shutoff
OFF ON Output shutoff Output shutoff Output shutoff
ON OFF Output shutoff Output shutoff Operation enabled
ON ON Output shutoff Operation enabled Output shutoff
Tab. 5-168: 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 (input terminal function selection) => page 5-422