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30 POSITIONING PARAMETER
30.2 Details of Parameters
External Start Signal
Setting method: High Speed I/O Parameter
Set this parameter to start positioning at high-speed using an external input signal.
This parameter can be used as a start command of the remaining distance operation or table shift command of stepping
operation of the DRVTBL instruction. (Page 374 Remaining distance operation, Page 549 Stepping operation)
■Enabled/Disabled
Specify whether to use the external start signal.
When [0: Disabled] is selected, the external start signal is not used.
When [1: Enabled] is selected, the external start signal is used.
With this parameter enabled, even when the drive contact of each positioning instruction is turned on, the standby status is
held. In this status, turning on the set input signal starts positioning.
■Device No.
The external start signal assignment is as follows.
*1 The number in is the head input number for each high-speed pulse input/output module.
Set the input response time (initial values: 10 ms) in input response time parameters. (Page 325 General-purpose Input
Functions)
This is not usable if all inputs are occupied with another high-speed input/output function. However, overlap of input numbers
is allowed for input interrupts. (Page 556 Functions that share inputs and outputs)
■Logic
Specify the logic of the external start signal.
When [0: Positive Logic] is selected, the external start signal functions on a rising edge.
When [1: Negative Logic] is selected, the external start signal functions on a falling edge.
Forward limit
Setting method: Special Device
Forward limit notifies the CPU module of the forward limit.
If forward limit is turned on while positioning operation is being output in the forward direction, the speed will decelerate, and
the operation will stop (the PLSY/DPLSY instruction will stop immediately). If forward limit is turned on while positioning
operation is being output in the reverse direction, it is ignored.
For details on the operation, refer to Page 370 Forward limit and reverse limit. A specific operation pattern is applied
when the DSZR/DDSZR instruction is used. (Page 367 Dog search function) Operation ends with an error after
deceleration stop when a positioning instruction other than the DSZR/DDSZR instruction is used.
■Special Device
During positioning operation, a change in the forward limit is applied at the next scan.
CPU module High-speed pulse input/output module
*1
First module Second module Third module Fourth module
Axis 1 Axis 2 Axis 3 Axis 4 Axis 5 Axis 6 Axis 7 Axis 8 Axis 9 Axis 10 Axis 11 Axis 12
X0 to X17 (Any device can be set.) X+7 X+6 X+7 X+6 X+7 X+6 X+7 X+6
Name CPU module High-speed pulse input/output module R/W
First module Second module Third module Fourth module
Axis 1 Axis 2 Axis 3 Axis 4 Axis 5 Axis 6 Axis 7 Axis 8 Axis 9 Axis 10 Axis 11 Axis 12
Forward limit SM5660 SM5661 SM5662 SM5663 SM5664 SM5665 SM5666 SM5667 SM5668 SM5669 SM5670 SM5671 R/W
R/W: Read/Write
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