Omron CS1W-MC221 - 02-2008 Operation Manual page 211

System Parameters
MPG Ratio (1 to 4)/
Electronic Gear (1 to 4)
Zone Parameters
Setting Zones
Positive (+) and Negative
(–) Zone Settings
184
These parameters set the ratio per pulse when using an MPG or sync
encoder. The ratio setting is extremely accurate because the numerator and
denominator can be set separately. A maximum of four ratios can be set for
each axis.
The following setting ranges are possible.
Numerator: –10,000 to 10,000
Denominator: 1 to 10,000
 numerator/denominator 
0.0001
The CS1W-MC421 setting window for the CX-Motion is shown below.
These parameters set the timing that will make the zone setting valid and set
whether zones 1 to 8 settings will be used.
Select the timing to one of the following: After the origin is established or
always (regardless of whether or not the origin has been established. The
default setting is after the origin is established.
Set the zone ranges after selecting Set for the zone.
When the present value is within the range set here, the zone flags for zones
1 to 8 will turn ON in the PLC interface area.
Present value
Zone Flag OFF
The following table shows zone flag allocations.
Word
MC221 MC421
n+22 n+38
n+25 n+41
--- n+44
--- n+47
10,000
Origin Present value
Zone setting range
Zone Flag ON
Axis Bits
X axis 08 to 15
Y axis
Z axis
U axis
Section 3-3
Bit names
Zone 1 Flag (bit
08) to Zone 8
Flag (bit 15)