External I/O Status Bits - Omron CJ1W-NC271 - 12-2009 Operation Manual

Axis Operating Input Memory Areas
Forward Software Limit Flag and Reverse Software Limit Flag
Word
Bits
Function
Reverse direction
Forward Software Limit Flag
(b+1, bit 12)
Reverse Software Limit Flag
(b+1, bit 13)
Details
4-8-5

External I/O Status Bits

I/O Word Bits
Input b+3 00
(PCU
01
to CPU
02
Unit)
03
04
05
06
07
08
09
10
11 to 15
b+1
12 and 13
These flags turn ON and OFF when the software limit function is enabled to
indicate the present position status for the forward/reverse software limit.
Forward Software Limit Flag
0: Within forward software limit range
1: Forward software limit range exceeded
Reverse Software Limit Flag
0: Within reverse software limit range
1: Reverse software limit range exceeded
Reverse Software Limit (Pn806)
Feedback position
Refer to 10-8 Software Limits.
The External I/O Status Bits (word b + 3) show the I/O status of the I/O signals
allocated to the Servo Drive.
b = Beginning word of Axis Operating Input Areas specified in Common
Parameters + (Axis No. −1) × 25
Category
External I/O Forward rotation limit input
status
Reverse rotation limit input
Origin proximity input signal
Encoder Phase A input
Encoder Phase B input
Encoder Phase Z input
External latch signal 1 input
External latch signal 2 input
External latch signal 3 input
Brake output
Emergency stop input
Reserved by the system.
Bit 10 (Emergency stop input) indicates the status of the emergency stop
input signal input when using a G5-series Servo Drive, G-series Servo Drive
or SMARTSTEP Junior Servo Drive. This bit is always 0 when using a W-
series Servo Drive, which does not have an emergency stop signal.
The SMARTSTEP Junior Servo Drive does not have inputs for external latch
signals 2 and 3. When using a SMARTSTEP Junior Servo Drive, the input sta-
tus for these signals will always be 0.
Forward Software Limit (Pn804)
Name
Returns the status of I/O signals
for each axis.
1: Signal valid
0: Signal invalid
The external I/O status shows the
enabled/disabled status of signals
used for PCU control.
This status is different from the
electrical ON/OFF status of the I/O
signals.
Section 4-8
Forward direction
Function
211