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30
Command mode communication check
Phenomenon
Confirmation and countermeasures
RUN LED does not illuminate.
Confirm that the power supply is correctly supplied to the power supply terminal
of the AD-8551R.
・
Is the voltage appropriate?
(
12 to 24 VDC
)
・
Is the cable connected correctly?
The RXD LED flashes before giving
instructions from the host.
Confirm the setting of the weighing device.
・
Is the data output mode set to key mode?
RD LED does not flash.
Confirm that the connection with the host is correct.
・
Is the cable properly connected to the RS-485 terminal?
・
Is a signal output from the host?
RUN LED is flashing.
RS-232C or RS-485 communication error.
Confirm whether RS-232C or RS-485 is in error
⋆1
and change the
communication settings.
RXD LED does not flash.
Confirm the signal contents from the host.
・
Is the AD-8551R set to command mode?
・
Does the device address specified on the host side match the device
address set in the AD-8551R?
・
Is the content sent from the host suitable for the command mode format?
Send the same content as “10-2 Communication format” from the host.
Confirm that the weighing device is connected and set correctly.
・
Is the cable properly connected to the RS-232C terminal?
・
Is the correct cable used?
・
Is the weighing device in weighing mode? (Is the display off, CAL mode or
internal setting mode, etc?)
The data received by the host is
corrupted.
・
Are multiple AD-8551R set to the same device address?
・
After outputting a data request command to the weighing device, is the next
command output without waiting for the receipt of weighing data?
・
Is the data output mode of the other weighing device set to key mode?
AD-8551R settings cannot be
changed.
Turn the AD-8551R off and the on again. When the power is turned on, the
switch status is read and reflected in the operation.
⋆1
.
Refer to “8. LED (status, error display)”