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3 Wiring
3.3.3 I/O Signal Names and Functions
3-8
3.3.3
I/O Signal Names and Functions
The following section describes SERVOPACK I/O signal names and functions.
Input Signals
Note: 1. The functions allocated to /DEC, P-OT, N-OT, /EXT1, /EXT2, /EXT3, P-CL, and N-CL
input signals can be changed via parameters.
2. The forward/reverse run prohibited function uses software to stop the SERVOPACK. This
method may not satisfy the standards depending on the safety specifications for the
application. If necessary, add an external safety circuit.
Output Signals
Note: 1. Pin numbers in parenthesis () indicate signal grounds.
2. The functions allocated to /BK, /S-RDY, and /COIN output signals can be changed to
/CLT, /VCT, /TGON, /WARN, or /NEAR signals via parameters.
Signal Name
Pin No.
Function
Common
/DEC
41
Zero point return deceleration limit switch: Deceleration LS used when the motor returns to the zero
point.
P-OT
N-OT
42
43
Forward run prohibited
Reverse run prohibited
Overtravel prohibited: Stops servomotor when movable part travels
beyond the allowable range of motion.
/EXT1
/EXT2
/EXT3
44
45
46
External latch signals 1, 2, and 3: External signals for latching the current FB pulse counter.
+24VIN
47
Control power supply input for sequence signals: Users must provide the +24-V power supply.
Allowable voltage fluctuation range: 11 to 25 V
BAT (+)
BAT (-)
21
22
Connecting pin for the absolute encoder backup battery.
Connect to either CN8 or CN1.
Signal Name
Pin No.
Function
Common
ALM+
ALM-
31
32
Servo alarm: Turns OFF when an error is detected.
/BK+
/BK-
27
28
Brake interlock: Output that controls the brake. The brake is released when this signal is ON.
/S-RDY+
/S-RDY-
29
30
Servo ready: ON if there is no servo alarm when the control/main circuit power supply is turned
ON.
ALO1
ALO2
ALO3
37
38
39 (1)
Alarm code output: Outputs 3-bit alarm codes.
Open-collector: 30 V and 20 mA rating maximum
FG
Shell
Connected to frame ground if the shield wire of the I/O signal cable is connected to the connector
shell.
Position /COIN+
/COIN-
25
26
Positioning completed (output in Position Control Mode): Turns ON when the number of error
pulses reaches the value set. The setting is the number of error pulses set in reference units (input
pulse units defined by the electronic gear).