Electronic Gear Function; Setting The System Parameters - Omron CS1W-MC221 - 02-2008 Operation Manual

Electronic Gear Function

Transfer Data (DM)
6-18 Electronic Gear Function
Overview
MPG input
Encoder input
circuitry
(with ratio set)
Sync encoder
input

6-18-1 Setting the System Parameters

Setting MPG or Sync Encoder
Setting the Electronic Gear Ratio
Mode: Manual; Method: System parameter setting (IOWR or CX-Motion)
The electronic gear function is provided for operations such as using a Man-
ual Pulse Generator (MPG) for handle feeding or using an absolute encoder
for synchronizing axis feeding with a conveyer. Both the numerator and
denominator can be specified, so this electronic gear function enables more
precise feed control than was possible with previous MC Unit models.
MC Unit
X-axis speed
reference
Y-axis speed
reference
Z-axis speed
reference
U-axis speed
reference
Electronic gear: Applies a fixed ratio to input pulses.
The electronic gear function can be enabled or disabled individually for
each axis (with the MPG Enable Bit). It is possible to enable and disa-
ble it for only the required axes with any given timing.
Using CX-Motion, make the setting in the Unit parameters to determine
whether an MPG or a sync encoder is to be used for pulse inputs.
The IORD instruction can also be used to read the parameter settings For
addresses, refer to 3-3-4 Data Configuration for System Parameters.
This setting specifies the ratio for pulse input devices connected to the MPG
or sync encoder. For the MPG, it is used to maintain a ratio of one. When it is
set for a sync encoder, the ratio can be specified as 1, 2, or 4.
When an MPG is used, the electronic gear ratio is the same as it was for pre-
vious MC Unit models.
The gear ratio for the MC221 and MC421 is set by CX-Motion or by an IOWR
instruction. There are two ways to change the electronic gear ratio:
• Change the electronic gear combination using the PLC Interface Area. (A
maximum of four can be changed in this way.)
Present position preset value: 10000
Position control Servo Driver
Position control Servo Driver
Position control Servo Driver
Position control Servo Driver
Section 6-18
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