Yaskawa Sigma II Series Servo System - Manual (Page 141)

Sigma II User’s Manual Chapter 5: Parameter Settings and Functions
5-55
Examples of Input Signal Allocation
The procedure used to allocate sequence input signals is described using the /S-ON
signal as a typical example.
As shown in the table above, the /S-ON signal can be allocated to any input terminal
from SI0 to SI6. /S-ON is always input when Pn50A.1 is set to 7, and an external
signal line would therefore not be needed because the servo amplifier will determine
whether the servo is ON or OFF.
The /S-ON signal is not used when Pn50A.1 is set to 8. This setting is meaningful
only in the following instances.
• When the factory set input signal are to be replaced by another input signal.
• The signal must be left ON (low level) during normal operation to make the
signal valid when OFF (high level) when forward run prohibit (P-OT) and
reverse run prohibit (N-OT) are input. The input terminal signal line must be left
ON even in system configurations that do not require this signal, but unnecessary
wiring can be eliminated by setting Pn50A.1 to 8.
• By setting 9 to F, the signal polarity can be reversed.
Note: Several signals can be allocated to the same input circuit.
When the servo is ON, the forward run prohibit or reverse run prohibit signal is used.
At a setting with inverted polarity, the failed safe operation may not be possible in the case of
signal line disconnection.
Pn50A.1
Setting
Description
0 Inputs the /S-ON signal from the SI0 (CN1-40) input terminal.
Signal polarity:
Normal.
Servo ON signal is
valid when low
(ON)
1 Inputs the /S-ON signal from the SI1 (CN1-41) input terminal.
2 Inputs the /S-ON signal from the SI2 (CN1-42) input terminal.
3 Inputs the /S-ON signal from the SI3 (CN1-43) input terminal.
4 Inputs the /S-ON signal from the SI4 (CN1-44) input terminal.
5 Inputs the /S-ON signal from the SI5 (CN1-45) input terminal.
6 Inputs the /S-ON signal from the SI6 (CN1-46) input terminal.
7 Sets /S-ON signal so that it is always valid.
8 Sets /S-ON signal so that it is always invalid.
9 Inputs the S-ON signal from the SI0 (CN1-40) input terminal.
Signal polarity:
Inversion.
Valid at OFF
(H level) with Servo
ON signal
A Inputs the/S-ON signal from the SI1 (CN1-41) input terminal.
B Inputs the S-ON signal from the SI2 (CN1-42) input terminal.
C Inputs the S-ON signal from the SI3 (CN1-43) input terminal.
D Inputs the S-ON signal from the SI4 (CN1-44) input terminal.
E Inputs the S-ON signal from the SI5 (CN1-45) input terminal.
F Inputs the/S-ON signal from the SI6 (CN1-46) input terminal.