7
Application Functions
7.1 Overview
This chapter describes the application functions that you can set before you start servo
system operation. It also describes the setting methods.
7.2 I/O Signal Allocations
7.2.1 Overview
Functions are allocated to the pins on the I/O signal connector (CN1) in advance. You can
change the allocations and the polarity for some of the connector pins. Function alloca-
tions and polarity settings are made with parameters.
This section describes the I/O signal allocations.
7.2.2 Input Signal Allocations
–
If you change the default polarity settings for the P-OT (Forward Drive
Prohibit) or N-OT (Reverse Drive Prohibit) signal, the overtravel func-
tion will not operate if there are signal line disconnections or other
problems. If you must change the polarity of one of these signals,
verify operation and make sure that no safety problems will exist.
–
If you allocate two or more signals to the same input circuit, a logical
OR of the inputs will be used and all of the allocated signals will
operate accordingly. This may result in unexpected operation.
The input signals that you can allocate to the pins on the I/O signal connector (CN1) and
the related parameters are given in the following table.
Input Signal
Input Signal Name
Parameter
P-OT
Forward Drive Prohibit
Pn50A = n.X
N-OT
Reverse Drive Prohibit
Pn50B = n.
X
/P-CL
Forward External Torque Limit
Pn50B = n.
X
/N-CL
Reverse External Torque Limit
Pn50B = n.X
/EXT1
Probe 1 Latch Input
Pn511 = n.
X
/EXT2
Probe 2 Latch Input
Pn511 = n.
X
/DEC
Home Switch Input
Pn511 = n.
X
FSTP
Forced Stop
Pn516 = n.
X
The following table shows the relationship between the input signal parameter settings,
the pins on the I/O signal connector (CN1), and polarities.
Parameter
Setting
Pin No.
Description
0
13
+24 V
Relationship between
Parameter Settings, Allo-
cated Pins, and Polarities
Sigma-7 Series SERVOPACKs
Application Functions
I/O Signal Allocations > Input Signal Allocations
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