Troubleshooting - Toshiba AD268 User Manual

PART 1 AD268

7.2 Troubleshooting

The table below shows the trouble and its remedy.
Trouble
Input type
setting error
Analog signal
wire breakage
(4-20mA only)
Analog signal
limit over
MPU error
ROM error
DP-RAM error Bit C is ON
External 24V
error
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Module LED
status info
Bit 7 is ON ON
(if the error
occurs in all
channels, it
is OFF)
Bit 8 is ON ON
Bit 9 is ON ON
Bit A is ON OFF
Bit B is ON OFF
OFF
Bit E is ON OFF
Module operation
The error channel Invalid input type
stops the parameter was set.
conversion. The A/D
conversion data is 0.
The A/D conversion In the 4-20mA
data of the channel input, less than
is 0. 4mA signal is input.
The A/D conversion Analog input signal
data of the channel is out of the range.
is limited by the limit
value.
The A/D conversion Internal processor
is stopped. operation is not
normal.
The A/D conversion EEPROM data
is stopped. error is detected.
The A/D conversion Buffer memory
is stopped. access error is
occurred.
The A/D conversion
Internal 15V
is stopped.
voltage is not
normal.
7. Troubleshooting
Cause Remedy
Set the correct
input type
parameter.
Check the analog
signal wire.
Check the signal
source (sensor).
Execute reset
command, or
cycle power off
and on.
Cycle power off
and on.
Cycle power off
and on.
Check the
external 24Vdc
power supply.
User's Manual
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