OPERATION MANUAL CompoBus/S

Turning the Power ON Section 6-1
6-1 Turning the Power ON
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Once all of the connections and settings have been made, power can be supplied
to all of the Units in the CompoBus/S System and communications can
be started.
!Caution Power Connections
Be sure to check the power supply connections carefully before turning the
power ON. Incorrect wiring can damage the Units in the system or cause
them to malfunction.
Required Settings The settings required for CompoBus/S I/O data communications are the Master
Unit switch settings, the node number setting, and the communications
mode setting on each Slave Unit. Depending on the Slaves being used, other
settings such as holding or clearing outputs for communications errors may be
required. Refer to SECTION 4 Master Unit Specifications and Operations and
SECTION 5 Slave Specifications and Operations for details.
Before turning ON the power, check the settings and wiring, referring to 3-5
Operations Checklist.
Turning the Power ON The Units in a CompoBus/S System can be turned ON in any order. Turn ON
the power to the Slaves first, however, to enable communications to start at
the same time that the Master Unit is started up. The following table shows
which Units are supplied by each power supply.
Unit Required power supply
Master PLC’s power supply
Network power supply Slave Communications power supply
(including the I/O power supply)
Dual power supply Slave Communications power supply and I/O power supply
Local power supply Slave Slave power supply
CompoBus/S communications will start up automatically once the required
power has been supplied to all of the Units.
Note 1. An error will not occur if the Slave has the same node number setting as
another Unit. Use the status area in the Master Unit to detect for Slaves
that have the same node number.
2. When the Slave registration function is used with a CS-series or CJ-series
Master Unit, the Slaves start to be checked after the Master has been started
up and the registered Slave input monitoring time has lapsed.
When Slaves are slow to power up, a verification error (Slave missing) may
occur, so check the power-up timing
3. When using a CS-series or CJ-series Master Unit, if the Slave registration
function is used and the system is started up after being connected and
set, incorrect node number settings and Slaves that are missing from the
network can be easily checked