Mitsubishi Electric MELSERVO-J4 Instruction Manual page 44

2. SIGNALS AND WIRING
Device Symbol
Zero speed ZSP
detection
Electromagnetic MBR
brake interlock
Speed command SA
reached
Home position ZP
return
completion
Connector
pin No.
ZSP turns on when the servo motor speed is zero speed (50r/min) or less.
CN1-23
Zero speed can be changed with [Pr. PC17].
OFF level
Forward
70 r/min
rotation
ON level
direction
50 r/min
Servo motor
0 r/min
speed
ON level
Reverse
-50 r/min
rotation
OFF level
direction
-70 r/min
ON
ZSP
(Zero speed
OFF
detection)
ZSP will turn on when the servo motor is decelerated to 50 r/min (at 1)),
and will turn off when the servo motor is accelerated to 70 r/min again (at
2)).
ZSP will turn on when the servo motor is decelerated again to 50 r/min (at
3)), and will turn off when the servo motor speed has reached -70 r/min (at
4)).
The range from the point when the servo motor speed has reached on
level, and ZSP turns on, to the point when it is accelerated again and has
reached off level is called hysteresis width.
Hysteresis width is 20 r/min for this servo amplifier.
When using the device, set operation delay time of the electromagnetic
brake in [Pr. PC16].
When a servo-off status or alarm occurs, MBR will turn off.
When a command speed is within a target speed at servo-on status, SA
will be on.
When the command speed is 0 r/min (mm/s), this will be continuously on.
When the command speed is in acceleration/deceleration or at servo-off
status, SA will be off.
When a home position return completes normally, ZP (Home position
return completion) will be on.
This will be off with the following conditions in the incremental system.
1) SON (Servo-on) is off.
2) EM2 (Forced stop 2) is off.
3) RES (Reset) is on.
4) At alarm occurrence
5) LSP (Forward rotation stroke end) or LSN (Reverse rotation stroke end)
is off.
6) Home position return is not being executed.
7) Software limit is being detected.
8) Home position return is in progress.
If once home position return is completed in the absolute position detection
system, ZP (Home position return completion) will be the same output
status as RD (Ready).
However, it will be off with the above 1) to 8) and the following conditions.
9) The home position return is not performed after [AL. 25 Absolute
position erased] or [AL. E3 Absolute position counter warning] occurred.
10) The home position return is not performed after the electronic gear
([Pr. PA06] or [Pr. PA07]) was changed.
11) The home position return is not performed after the setting of [Pr.
PA03 Absolute position detection system selection] was changed from
"Disabled" to "Enabled".
12) [Pr. PA14 Rotation direction selection/travel direction selection] was
changed.
13) [Pr. PA01 Operation mode] was changed.
14) [Pr. PT08 Home position return position data] or [Pr. PT28 Number of
stations per rotation] was changed.
Function and application
1)
3)
2)
4)
2 - 21
Control
I/O
mode
division
CP CL PS
DO-1
20 r/min
(Hysteresis width)
[Pr. PC17]
[Pr. PC17]
20 r/min
(Hysteresis width)
DO-1
DO-1
DO-1