Functional Overview - Omron CP1L CPU UNIT - 06-2007 Operation Manual

Inverter Positioning
5-3-3

Functional Overview

Operation
Point 1.
CP1L
PLC Setup
Ladder Program
■ Inverter Positioning
Settings
⋅ Enable function
⋅ Calculation cycle
⋅ Motor/encoder specs
⋅ Gain
⋅ In-position width
⋅ Min./max. output
Frequency command
⋅ Error settings
conversions for inverter
⋅ Etc.
■ High-speed
Counter Settings
⋅ Enable counter
⋅ Mode settings
⋅ Etc.
■ Serial Port Settings
(When using serial
communications for
Output to CP1W-CIF11
outputs to the inverter.)
Output to Analog Unit
264
Point 2.
Point 3.
Point 4.
Positioning
instructions
Internal pulses
Pulse output Error
instruction
counter
(PLS2, PULS +
SPED, etc.)
Port Setting
Position
No. 0: #0020 feedback
No. 1: #0021
MOV
(operation
commands,
Error Counter Status
output values,
(forward/reverse commands, in-position
present values
status, etc.)
Stored in Auxiliary Area bits.
MOV
(automatically
Forward/reverse commands
calculated inverter
and other commands
frequency
commands
Analog output: Output bits
Serial: Serial communications
MOV
(forward/reverse
operation)
Modbus
communications
register settings
Analog output
settings
1. To use inverter positioning, the motor and encoder specifications, feed-
back gain, and other parameters must be set in the PLC Setup. The high-
speed counter and inverter must also be set.
2. Pulse output instructions, such as PLS2 or PULS with SPED, are used to
execute positioning. Although normally the pulse output instructions are
used to output pulses from CP1L output contacts, when inverter position-
ing 0 or inverter positioning 1 is enabled in the PLC Setup, the internal po-
sition error counter (called simply the "error counter") is enabled and the
pulse output instruction will output internal pulses to the error counter. Both
error counters 0 and 1 can be used at the same time.
3. For the number of pulses (i.e., the amount of movement) set in the pulse
output instruction, use the number of feedback pulses from the encoder.
For the pulse frequency set in the pulse output instruction, use the motor
power supply frequency converted to the feedback pulse frequency from
the encoder. (Refer to 5-3-7 Determining the Internal Pulse Output Fre-
quency for details.)
4. Specify an inverter positioning port for the pulse output instruction (port 0:
0020, port 1: 0021). The internal pulses will be output to the error counter
for the specified port.
5. The number of pulses remaining in the error counter is converted to a pow-
er supply frequency command for the inverter according to a value set in
the PLC Setup and output to a word in the Auxiliary Area in increments of
0.01 Hz.
6. The frequency command value output to the Auxiliary Area is output to the
inverter from the ladder program according to the inverter command meth-
od (i.e., RS-485 communications or analog output). (Refer to 5-3-9 Auto-
matic Calculation of Inverter Frequency Command Value for details.)
Point 5.
Point 8.
CP1W-CIF11
Conversion
using PLC Setup
Auxiliary
Area word
Gain
0.01 Hz
increments
Output
compensation
(upper/lower
limits)
High-speed
counter input
terminal
Point 7.
Point 9.
Section 5-3
Point 1.
Point 6.
Serial or
analog
Inverter
output
Power
supply
frequency
Encoder
CP1W-DA041/MAD11
CPM1A-DA041/MAD11
Feedback pulses
(See note.)
Note: There is no speed or current (i.e.,
torque) loop.
Inductive
motor