Omron CJ-Series Operation Manual page 122

Built-in Outputs
Switching from Continuous Mode (Speed Control) to Independent Mode (Positioning)
Example applica-
tion
Change from speed
control to fixed dis-
tance positioning
during operation
Pulse frequency
Target
frequency
Execution of
SPED(885)
(continuous) Execution of
Fixed distance feed
Pulse
interrupt
frequency
Present
frequency
Execution of
ACC(888)
(continuous) Execution of
Conditions Required to Execute an Instruction During Operation
Instruction being executed
SPED(885)
(Independent mode)
SPED(885)
(Continuous mode)
Frequency changes
Outputs the number of
pulses specified in
PLS2(887) (Both relative
and absolute pulse
specification can be used.)
Time
PLS2(887)
Time
PLS2(887) with the
following settings
• Number of pulses = number
of pulses until stop
• Relative pulse specification
• Target frequency = present
frequency
• Acceleration rate = 0
• Deceleration rate = target
deceleration rate
The following table shows the pulse output instructions that can be executed
while another pulse output instruction is being executed.
When positioning is being performed in independent mode, another indepen-
dent mode instruction can be executed. When speed control is being per-
formed in continuous mode, another continuous mode instruction can be
executed. PLS2(887) is only instruction that can be used to switch between
modes. (PLS2(887) can switch to a positioning operation from a continuous
mode operation started with ACC(888).)
With the CJ1M CPU Unit, it is possible to execute a pulse control instruction
during acceleration/deceleration or execute a positioning instruction to over-
ride another positioning instruction that is in progress.
(Yes: Can be executed; No: Cannot be executed)
INI SPED
(Ind.)
Yes 1
Yes
Yes No
Description
Instruction
PLS2(887) can be ACC(888)
executed during a (Continu-
speed control oper- ous)
ation started with ↓
ACC(888) to
PLS2(887)
change to position-
ing operation.
Overriding instruction
SPED ACC
(Cont.) (Ind.) (Cont.)
No 3 No
Yes
No
2
Yes Yes
Section 5-2
Procedure
Settings
•Port
•Acceleration rate
•Deceleration rate
•Target frequency
•Number of pulses
Note The starting fre-
quency is ignored.
ACC PLS2 ORG
No No
No No
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