User Manual
Chapter 7
GFK-1742F
Jan 2020
Programmed Motion
214
Parameter Number Special Purpose Function
Axis
Units
250
Commanded Position at Follower Enable Trigger Axis 4
user units
251
Follower Incremental Stop Distance
Axis 4
user units
252-255
Reserved
Parameters are all reset to zero after a power cycle or after a DSM314 configuration is stored
by the host controller. Parameters can be assigned in three ways:
•
The motion program LOAD command.
•
The Load Parameter Immediate %AQ command.
•
The COMM_REQ function block. This is the preferred way if you need to send
multiple parameters per scan. The COMM_REQ function block is described in
Appendix B.
Assigning a value to a parameter overwrites any previous value. Parameter values can be
changed during program execution, but the change must occur before the DSM314 begins
executing the Type 3 command (Move, Wait or Dwell) previous to the Type 3 command that
uses the parameter. This is due to the pre-processing of Type 3 commands that occurs
within the DSM314. Note that a JUMP command clears preprocessing and forces the
program commands at the jump target to be processed.
Below is an example of a motion program using Parameters. The values of Parameters 1-5
are pre-loaded with a COMREQ command from the host controller at least two program
blocks before usage.
(Rem
ember that “program blocks” are not the same as sections
of the motion program that
are labeled with the BLOCK # command.)
Block/Command/Data Comments
1:
VELOC P001 // Set velocity of first move = value in Parameter 1
ACCEL P002 // Set acceleration of first move = value in Parameter 2
CMOVE P003, ABS, LINEAR // Reach velocity of 2nd move (20000) at position = Par. 3
2:
VELOC 20000 // Set velocity of second move = 20000
PMOVE 20000, INCR, LINEAR // Normal PMOVE
DWELL P004 // Dwell for Parameter 4 time
PMOVE P005, INCR, LINEAR // PMOVE to value in Parameter 5
(* Strobe #1 occurs on Axis-1 during move to Param. 5 position *)
DWELL 1000 // Dwell for one second
LOAD P006,2000 // Load Parameter 6 parameter
3:
MOVE P224, INCR, LINEAR // Move to strobed position for Strobe #1 on axis-1
DWELL 2000 // Dwell for two seconds
PMOVE P006, ABS, S-CURVE // Final stop position = value in Parameter 6