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Wiring Servo Relay Units Section 3-4
6. Signal Switches
Note (a) An external encoder with a line-driver output can be connected.
(b) For 4 to 20 mA current inputs, voltage input (+) and current input
do not need to be connected.
7. Terminating Resistance Switch
Set this terminating resistance switch to ON when the Servo Relay Unit is
at the end of the RS-422A line and the PORT2 terminal is not connected
to PORT1 on another Servo Relay Unit.
8. Servo Driver Phase B Switches
When the high-speed counter is set to absolute mode CW in the System
Setup, inputs are the inverse of the phase from the encoder output phase
B from the Servo Driver. The high-speed counter is used in incremental
mode for all other System Setup settings.
Switch Setting details
CNT1
SER_A
SER_A Connects the Servo #1 phase A to the Motion Control
Module's CNT1 phase A.
TER_A Connects the external encoder phase A to the Motion
Control Module's CNT1 phase A. (See note a.)
CNT1
SER_B
SER_B Connects the Servo #1 phase B to the Motion Control
Module's CNT1 phase B.
TER_B Connects the external encoder phase B to the Motion
Control Module's CNT1 phase B. (See note a.)
CNT1
SER_Z
SER_Z Connects the Servo #1 phase Z to the Motion Control
Module's CNT1 phase Z.
TER_Z Outputs the Servo #1 phase Z output from the terminal.
DA2 Y axis Connects FQM1-MMA21 analog output 2 to Servo #2
REF.
X axis Connects FQM1-MMA21 analog output 2 to Servo #1
TREF.
AD VOL Sets analog inputs as voltage inputs.
CUR Sets analog inputs as current inputs. (See note b.)
TER_A
SER_A
CNT1
SER_B
CNT1
TE
R_B
CUR
SER_Z
CNT1
DA2
VOL
AD
TER_Z X axis
Y axis
TERM
ON
OFF
SW6
INC
INC
SW7
SW8
servo2
ABS_CW-
servo1
ABS_CW-
Servo #2
phase B switch
Servo #1
phase B switch