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C200HW-SRM21-V1 Master Unit for CS-series, C200HX/C200HG/C200HE-(Z)E, and C200HS PLCs
Section 4-1
!Caution
Always turn OFF the PLC before changing the unit number setting.
• The Master Unit is shipped with the unit number set to 0.
• The unit number setting determines which words in the PLC’s Special I/O
Unit Area are allocated to the Master Unit. Refer to
in CS-series, C200HX/C200HG/C200HE-(Z)E, and C200HS PLCs
for
details.
• The Master Unit is allocated twice as many words in the PLC’s Special I/O
Unit Area (the words for unit number set on the Master and the next unit
number) when the usable node number setting is set to IN0 through IN15
and OUT0 through OUT15. In this case, neither the Master’s unit number
nor the next unit number can be used on another Special I/O Unit
mounted in the PLC.
• If the same unit number is used for the Master and another Special I/O
Unit, an I/O UNIT OVER error will occur in the PLC and it will not be pos-
sible to start up the CompoBus/S System.
• For the following PLCs, unit numbers A to F cannot be set:
C200HE, C200HS, C200HG-CPU33-(Z)E, C200HG-CPU43-(Z)E,
C200HX-CPU34-(Z)E, and C200HX-CPU44-(Z)E
DIP Switch
The DIP switch is used to set the range of usable node numbers of Slaves and
the communications mode.
Note
1.
Always turn the PLC OFF before changing the settings.
2.
Leave pins 3 and 4 set to OFF.
Set pin 1 of the DIP switch as shown in the following table.
Set pin 2 of the DIP switch as shown in the following table.
Note
1.
Make sure that the communications mode of the Master Unit matches that
of all Slaves. If the CompoBus/S System contains a Slave whose commu-
nications mode does not agree with that of the Master Unit, the COMM in-
dicator on that Slave will not light, and normal communications with that
Slave will not be possible. Other Slaves will not be adversely affected. (In
such cases, the COMM indicator on the Master Unit will light normally.) For
information relating to the states of the Master Unit indicator, refer to
2.
When using an existing Master Unit model without V1, pin 2 must be set to
OFF. Otherwise, normal communications may not be possible.
Reserved (Always OFF.)
Usable node numbers
Communications mode
Pin 1 setting
Usable node number setting
OFF
IN0 to IN7 and OUT0 to OUT7
ON
IN0 to IN15 and OUT0 to OUT15
Pin 2
setting
Communications
mode setting
Communications
distance
Communications
baud rate
Communications
cycle time
OFF
High-speed Com-
munications Mode
100 m max.
750 kbps
0.5 ms or 0.8 ms
ON
Long-distance
Communications
Mode
500 m max.
93.75 kbps
4.0 ms or 6.0 ms