Omron NE1A-SCPU01 - 07-2009 - Muting Unit Ver. 1.0 or Later

178
Command Reference: Function Blocks Section 8-5
Truth Table
Truth Table for Routing Evaluation
0: OFF, 1: ON
8-5-12 Muting
Diagram
General Description
This function can be used with unit version 1.0 or later (including Controllers
that support EtherNet/IP).
The Muting function block provides both muting and override functions.
Muting
Muting can be used to temporarily disable safety functions, e.g., so that work-
pieces or palettes can pass through the detection area of a light curtain. The
Muting function block temporarily disables the input signal (AOPD input) of a
light curtain while the muting condition is met and keeps the Output Enable
signal turned ON even if the light curtain is interrupted until the muting end
condition is met.
Supported Muting Applications
Any of the following four muting modes can be selected to enable typical mut-
ing applications.
Input 1 Output
1
Output
2
Output
3
Output
4
Output
5
Output
6
Output
7
Output
8
0
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1
Unit Ver. 1.0 or Later
Default Maximum Number of I/O
AOPD
Input1 (NC)
AOPD
Input2 (NC)
Muting Signal11
Muting Signal12
Output
Enable
Muting
Status
AOPD Input1 (NC)
AOPD Input2 (NC)
Override Input1 (NC)
Override Input2 (NC)
Muting Signal11
Muting Signal12
Muting Signal21
Muting Signal22
Output Enable
Muting Status
Override Status
Sequence Error
Synchronization Error
Discrepancy Error (AOPD)
Discrepancy Error (Override)
Fault Present
Muting Mode Application
Parallel Muting with 2
Sensors
This mode is suitable for applications at a conveyor entrance.
Use this mode when two Retro-reflective Photoelectric Sensors are set
up as the muting sensors with intersecting detection zones.
Sequential Muting
(Forward Direction)
This mode is suitable for applications at a conveyor entrance.
Use this mode when four Through-beam Photoelectric Sensors are set
up as the muting sensors.
Sequential Muting
(Both Directions)
This mode is suitable for applications at a conveyor entrance or exit.
Use this mode when four Through-beam Photoelectric Sensors are set
up as the muting sensors.
Position Detection This mode is suitable for applications in which the operator sets the
workpiece and then the workpiece is moved to the processing area by a
turn table or workpiece conveyor robot. Muting is enabled by detecting
that the robot is in a safe location using a limit switch or other device.
Use this mode to temporarily disable the light curtain when the operator
sets the workpiece at the conveyor entrance.