2.6 Servo Command I/O Signal (SVCMD_IO)
2.6.2 Bit Allocation of Servo Command I/O Signal Monitoring
2-24
Details of I/O Signal Bits
The following table shows the details of the I/O signal bits.
Bit
Name
Description
Value
Setting
1
DEC
Zero Return Deceleration
Limit Switch Input
0
OFF
1
ON
The status used to judge the state of the deceleration limit switch used for zero point
return operation
2
P_OT
Forward Drive Prohibition
Input
0
OFF
1
ON
Overtravel (OT) is a function that forcibly stops a movable machine unit if it moves beyond
its range of movement.
P_OT is the status used to judge if the movable machine unit is in the forward drive prohib-
ited state. The OT stop judgment is made based on ZSPD.
3
N_OT
Reverse Drive Prohibition
Input
0
OFF
1
ON
Overtravel (OT) is a function that forcibly stops a movable machine unit if it moves beyond
its range of movement.
N_OT is the status used to judge if the movable machine unit is in the reverse drive prohib-
ited state. The OT stop judgment is made based on ZSPD.
4
EXT1
External Latch 1 Input
0
OFF
1
ON
The status used to judge the state of the external latch 1 input signal
[Important]
The
-7F Integrated Servomotor (Model: SGF7
-
2
) does not support
monitoring because it lacks external input signal 1. The value will be undefined.
5
EXT2
External Latch 2 Input
0
OFF
1
ON
The status used to judge the state of the external latch 2 input signal
[Important]
The
-7F Integrated Servomotor (Model: SGF7
-
2
) does not support
monitoring because it lacks external input signal 2. The value will be undefined.
6
EXT3
External Latch 3 Input
0
OFF
1
ON
The status used to judge the state of the external latch 3 input signal
[Important]
The
-7F Integrated Servomotor (Model: SGF7
-
2
) does not support
monitoring because it lacks external input signal 3. The value will be undefined.
7
ESTP
(HWBB)
Emergency Stop
0
OFF
1
ON
When the HWBB1 or HWBB2 signal is input, the power supply to the motor is shut OFF
forcibly and the motor stops according to the setting of Pn001 = n.
X.
9
BRK_ON
Brake Application Output
0
Brake released
1
Brake applied
The holding brake is used in applications where the servo driver controls the vertical axis.
This is the status used to judge the state of the holding brake control signal (/BK). Note
that the logic is the inverse of that of the hardware output (/BK).
10
P_SOT
Forward Software Limit
0
Range of motion
1
Drive prohibited due to forward
software limit
The software limit forcibly stops a movable machine unit if it moves beyond the software
limit range in the same manner as the overtravel function, with or without using P_OT and
N_OT (overtravel signals).
This is the status used to judge if the movable machine unit is in the Forward Software
Limit state (common parameter: 26).
Continued on next page.