Coffeemaker User Manual

84
Analog I/O Modules (AD268 / DA264 / TC218)
7. Troubleshooting
PART 3 TC218
7.2 Troubleshooting
The table below shows the trouble and its remedy.
Trouble Module
status info
LED Module operation Cause Remedy
Input type
setting error
Bit 7 is ON ON
(if the error
occurs in all
channels, it
is OFF)
The error channel
stops the
conversion. The A/D
conversion data is 0.
Invalid input type
parameter was set.
Set the correct
input type
parameter.
Thermocouple
burnout
Bit 8 is ON ON The A/D conversion
data of the channel
is 32767 (H7FFF).
The thermocouple
input wire becomes
open.
Check the
thermocouple.
Analog signal
limit over
Bit 9 is ON ON The A/D conversion
data of the channel
is limited by the limit
value.
Analog input signal
is out of the range.
Check the signal
source (sensor).
MPU error Bit A is ON OFF The A/D conversion
is stopped.
Internal processor
operation is not
normal.
Execute reset
command, or
cycle power off
and on.
ROM error Bit B is ON OFF The A/D conversion
is stopped.
EEPROM data
error is detected.
Cycle power off
and on.
DP-RAM error Bit C is ON OFF The A/D conversion
is stopped.
Buffer memory
access error is
occurred.
Cycle power off
and on.
External 24V
error
Bit E is ON OFF The A/D conversion
is stopped.
Internal ±15V
voltage is not
normal.
Check the
external 24Vdc
power supply.
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