Wiring Precautions - Omron R88A-MCW151-DRT-E Operation Manual

Wiring Precautions

2-5 Wiring Precautions
40
Servo Driver. This will achieve a fast response of both the Servo Driver and
MC Unit.
For the Servo Driver, the limit switches should be connected to pins CN1-42
(FWD) and CN1-43 (REV). When using the MC Unit, the switches can be con-
nected to any of the inputs. In both cases the axis parameters FWD_IN and
REV_IN for axis 0 are used to assign the limit switch inputs for the MC unit.
When the Servo Driver inputs are used, define FWD_IN=18 and REV_IN=19.
When the limits are connected to the Servo Driver and the correct settings are
set, the Driver will apply the dynamic brake to stop the Servomotor. Also the
appropriate bit of the AXISSTATUS axis parameter will be set.
Electronically controlled equipment may malfunction because of noise gener-
ated by power supply lines or external loads. Such malfunctions are difficult to
reproduce, and determining the cause often requires a great deal of time. The
following precautions will aid in avoiding noise malfunctions and improving
system reliability.
• Use electrical wires and cables of the designated sizes as specified in the
operation manual for the Servo Driver. Use larger size cables for FG lines
of the Servo Driver and ground them over the shortest possible distances.
• Separate power cables (AC power supply lines and motor power supply
lines) from control cables (encoder lines and external input signal lines).
Do not group power cables and control cables together or place them in
the same conduit.
• Use shielded cables for control lines.
• Use the ready-made cables designed for MC Unit to reduce connectivity
problems.
• Connect a surge absorbing diode or surge absorber close to relays. Use a
surge-absorbing diode with a voltage tolerance of at least five times
greater than the circuit voltage.
DC relay
+
DC
RY
-
• Noise may be generated on the power supply line if the same power sup-
ply line is used for an electric welder or electrical discharge unit. Connect
AC relay
AC
Surge
absorbing
diode
Solenoid
Surge
SOL
absorber
Section 2-5
Surge
RY
absorber