7 AUXILIARY AND APPLIED FUNCTIONS
7.7 Pressure Control
457
7
Feed/dwell operation
A servo program for feed/dwell operation is not necessary. Pressure profile data from the device specified with the pressure
control parameter "Pressure profile start device" is written to the device, and feed/dwell operation starts by turning the feed/
dwell startup device from OFF to ON. The acceleration/deceleration time or pressurization/depressurization time for the
speed limit value and pressure command can be set separately.
An acceleration/deceleration time or pressurization/depressurization time for speed limit value or pressure command that is
valid only when switching from feed operation to dwell operation can also be set.
By setting "1: The time constant is invalid and pressure command points for the second step and after are connected with a
straight line" in "Mode selection" of the pressure profile data, the time constant can be made invalid for the pressure command
of the second step of dwell data and after, and the operation can connect steps with a straight line.
When the "Pressure increasing direction selection for positioning address" of the servo parameter "Pressure control function
selection 1 (PT12)" is set to "0: Increase pressure with the decrease of positioning address", or for servo amplifiers that do not
support "Pressure increasing direction selection for positioning address", set the address direction of the servo amplifier so
that forward direction is a negative direction.
When the servo parameter "Pressure control function selection 1 (PT12)" is changed, turn the power supply of
the Multiple CPU system OFF to ON again, or reset the Multiple CPU system.
If operated without the new settings being reflected in the system, an unintended operation such as the
movement to the end address without referring to load cell pressure may occur.
S1
1H
2
4
8
10
S2
S3
S4
T1
SS
Speed/
Pressure
V0
PR0
V1
PR1
V4
PR4
V2
PR2
V3
PR3
V1
V2
PR2
PR1
1H
2
Feed to dwell switching
Execution point output No.
Mode reset
Feed
Dwell
Summary of Contents for MELSEC iQ-R16MTCPU
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