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Indicator
ERH
CH1
CH2
CH3
CH4
2-1-3
Machine Number Switch
Use the unit number switches to set the unit number specific for each Special I/O Unit mounted in a
CPU Rack or Expansion Rack.
Turn OFF the Controller before changing the unit number setting.
One 4-Channel Counter Unit occupies areas for four special I/O Units in a CPU Unit.
Precautions for Safe Use
Always turn OFF the controller power before setting the unit number.
Precautions for Correct Use
Precautions for Correct Use
• When setting a rotary switch, use a flat-blade screwdriver and be careful not to damage the
switch.
• Be sure not to leave the rotary switch midway between numbers.
Additional Information
• If two or more Special I/O Units are set to an identical Unit number or if one Special I/O Unit is
set to areas of plural Unit numbers, the CPU Unit has a major fault level error "Duplicate Unit
Number" and stops operation.
• After correcting the unit number setting, cycle the power to the Controller.
CJ-series 4-Channel Counter Unit Operation Manual for NJ-series CPU Unit (W512)
Color
State
Red
ON
OFF
Yellow
ON
OFF
Yellow
ON
OFF
Yellow
ON
OFF
Yellow
ON
OFF
2 Components, Installation and Wiring
Description
CPU Unit has operational failure. (For a list of all the
errors that can occur at the CPU Unit see 5-1 Error Indica-
tors)
CPU Unit has no operational failure.
Counter 1 is counting, i.e. the corresponding counting
gate is enabled and at least one pulse has been detected.
Counter 1 is not counting, i.e. the corresponding counting
gate is closed or no pulses have been detected.
Counter 2 is counting, i.e. the corresponding counting
gate is enabled and at least one pulse has been detected.
Counter 2 is not counting, i.e. the corresponding counting
gate is closed or no pulses have been detected.
Counter 3 is counting, i.e. the corresponding counting
gate is enabled and at least one pulse has been detected.
Counter 3 is not counting, i.e. the corresponding counting
gate is closed or no pulses have been detected.
Counter 4 is counting, i.e. the corresponding counting
gate is enabled and at least one pulse has been detected.
Counter 4 is not counting, i.e. the corresponding counting
gate is closed or no pulses have been detected.
2
2-3
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