Omron Sysmac CJ Series, Operation Manual

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Troubleshooting Section 5-2
5-2-3 Troubleshooting from Symptoms: Output Errors
No Control Output or No Alarm Output
5-2-4 Troubleshooting from Symptoms: HB Alarm Errors
Heater Burnout Not Detected
Step Possible Cause Remedy
Connection The measured temperature is incorrect. Refer to 5-2-1 Troubleshooting from Symptoms: Mea-
surement Errors for troubleshooting directions.
The load’s polarity is reversed or the load is wired
to the wrong terminals. Wire the load correctly.
The connected load exceeds the output ratings. • Use a load within the output’s ratings.
• Repair the load if it is malfunctioning.
A load power supply is not connected to the tran-
sistor output. Provide a power supply that is suitable for the output
ratings and load.
The polarity is reversed to the transistor output’s
load power supply. Wire the power supply correctly.
Settings Temperature control has not been started. Turn OFF the Stop Bit.
The wrong loop number is specified. Make settings for the correct loop number.
The loop is disabled. (Alarm mode 1 and alarm
mode 2 are set to FF.) Set an alarm mode. Refer to 2-5-5 Initialization Data for
details.
The set point is incorrect. Set the correct set point.
The alarm mode is set to 0 (no alarm). Set the correct alarm mode.
An alarm with a standby sequence has been set. Set an alarm mode without a standby sequence.
A deviation alarm or absolute value alarm has
been set incorrectly. Set the correct alarm mode.
Step Possible Cause Remedy
Connection A Current Transformer (CT) is not connected. Connect a CT.
The CT is connected to the wrong channel. Input the CT correctly.
The heater is being operating with another output,
i.e., one from an Output Unit. Change the wiring to control output that corresponds to
the CT input.
The connected CT is not an OMRON E54-CT1 or
E54-CT3. CTs other than the OMRON E54-CT1 and E54-CT3
cannot be used. Connect an E54-CT1 or E54-CT3.
Settings Temperature control has not been started. Start temperature control.
The control output’s ON time is less than 200 ms. The heater burnout alarm will operate when the control
output’s ON time is longer than 200 ms.
The heater’s power supply was turned ON after
temperature control was started. Start temperature control after the heater’s power sup-
ply has been turned ON.
The heater burnout current is set to 0.0 or 50.0 A. Set the appropriate heater burnout current between 0.1
and 49.9 A
The heater burnout current is based on the
heater’s rated current. Take an actual measurement of the heater’s current to
determine the appropriate heater burnout current.
The heater burnout current from the actual mea-
surement is not appropriate. Consider the voltage range of the heater’s power supply
and current measurement error. Set the heater burnout
current again.
Usage The heater current exceeds 50.0 A. Use a heater current of 50.0 A or less.
The heater current is DC. The heater burnout alarm cannot be used with a DC
heater.
A pure metallic heater is being used. Take an actual measurement of the heater’s current to
determine the appropriate heater burnout current.