Yaskawa LEGEND-MC - Manual (Page 85)

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LEGEND-MC User’s Manual
CB (Clear Bit)
[I/O]
DESCRIPTION:
The CB command clears a bit on the output port by setting it to logic zero. Slave controller or Modbus
outputs can be cleared also.
When using this command to access I/O on a slave controller in distributed control mode, use it with the
handle for outbound master commands. Do not use the handle which is for incoming slave update packets.
For example, if a slave is connected on handles E and F, reference the I/O for the slave on handle E.
ARGUMENTS: CB n where
n is an integer corresponding to a specific output on the controller to be cleared (set to 0). The first output
on the controller is denoted as output 1. A LEGEND-MC controller has 4 digital outputs plus applicable I/
O connected by Modbus.
DISTRIBUTED CONTROL:
MODBUS:
NOTE: When using Modbus devices, the I/O points of the modbus devices are calculated
using the following formula:
n = (SlaveAddress*1000) + (HandleNum*1000) + ((Module-1)*4) + (Bitnum-1)
Slave Address is used when the ModBus device has slave devices connected to it and specified as
Addresses 0 to 255. The use of slave devices for modbus are very rare and this number will usually be 0.
HandleNum is the handle specifier from A to P (1 - 16).
Module is the position of the module in the rack from 1 to 16.
BitNum is the I/O point in the module from 1 to 4.
USAGE:
RELATED COMMANDS:
Handle Command Handle Command
A CB101 ~ CB104 I CB901 ~ CB904
B CB201 ~ CB204 J CB1001 ~ CB1004
C CB301 ~ CB304 K CB1101 ~ CB1104
D CB401 ~ CB404 L CB1201 ~ CB1204
E CB501 ~ CB504 M CB1301 ~ CB1304
F CB601 ~ CB604 N CB1401 ~ CB1404
G CB701 ~ CB704 O CB1501 ~ CB1504
H CB801 ~ CB804 P CB1601 ~ CB1604
While Moving Yes Default Value ---
In a Program Yes Default Format ---
Command Line Yes
Can be Interrogated No
Used as an Operand No Distributed Control Offset by 100
"SB" Set Bit
"OP" Define all outputs