362
Checking Operations for CS-series, C200HX/C200HG/C200HE-(Z)E, and C200HS Master Units
Section 6-2
The Master Unit’s
SD indicator is
OFF
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Either reset the Master Unit with the PLC’s Restart Bit or turn
the PLC OFF and then ON again. Replace the Master Unit if
the error recurs.
The Master Unit’s
RD indicator is
OFF
The communications cable is not con-
nected to the Master.
Connect the communications cable correctly.
A Slave’s number has been set to 8 to
15 even though the usable node
address setting is IN0 to IN7 and
OUT0 to OUT7.
Either change the Input and Output Slave’s node number set-
tings so that they are 0 to 7 or change the usable node num-
ber setting to IN0 to IN15 and OUT0 to OUT15.
One of the Slaves is not turned ON.
(The Slave’s PWR indicator is OFF.)
Turn ON the Slave’s power supply.
There is a problem with the Slaves’
power supply.
Check the power supply cable connections and connect the
cables to the Slaves correctly.
The Slaves’ power supply is inade-
quate.
Check the power supply capacity. If it is inadequate, either
change the system configuration or change the power supply
so that sufficient power is provided.
There is a problem with the communi-
cation cable connection or the cable
itself.
Check the connections and cable. Replace the communica-
tions cable if it is faulty.
Communications modes of Master
Unit and Slave do not match.
Set the communications mode so that it is the same as that of
the Master Unit.
A common system mistake has been
made. (Refer to the table on page 364
for a list of common mistakes.)
Refer to the table on page 364 for common mistakes and
their remedies.
The Master Unit is faulty.
Replace the Master Unit.
The Master Unit’s
ERC indicator is
ON
Power is not being supplied to the
Slaves.
Turn ON the Slave’s power supply.
There is a problem with the Slaves’
power supply.
Check the power supply cable connections and connect the
cables to the Slaves correctly.
The Slaves’ power supply is inade-
quate.
Check the power supply capacity. If it is inadequate, either
change the system configuration or change the power supply
so that sufficient power is provided.
There is a problem with the communi-
cation cable connection or the cable
itself.
Check the connections and cable. Replace the communica-
tions cable if it is faulty.
There is a non-existent node number
because a Slave’s node number was
changed after communications were
established.
Either reset the Master Unit with the PLC’s Restart Bit or turn
the PLC OFF and then ON again.
The same node number is used on
two Slaves.
Change the Slaves’ node number settings to eliminate the
duplication and then turn the Slaves ON again. Either reset
the Master Unit with the PLC’s Restart Bit or turn the PLC
OFF and then ON again.
A common system mistake has been
made. (Refer to the table on page 364
for a list of common mistakes.)
Refer to the table on page 364 for common mistakes and
their remedies.
A Slave Unit is faulty.
Replace the faulty Slave Unit.
Error
Probable cause
Possible remedy
