103
CS1W-SRM21 Master Unit for CS-series PLCs
Section 4-2
1,2,3...
1.
Turn OFF pin 4 of the DIP switch on the Master Unit to disable the Slave
registration function.
2.
Turn ON the power to the CPU Unit to which the Master Unit is mounted.
3.
Use a Programming Device for the CPU Unit to set the following informa-
tion in the Special I/O Unit DM Area words used by the Master Unit.
• Output Slave registration table
• Input Slave registration table
• Registration Slave participation monitoring time
4.
Turn OFF the power to the CPU Unit to which the Master Unit is mounted.
5.
Turn ON pin 4 of the DIP switch on the Master Unit to enable the Slave reg-
istration function
6.
Turn ON the power to the CPU Unit to which the Master Unit is mounted or
restart the Master Unit.
The settings in the Special I/O Unit DM Area can be set while pin 4 of the DIP
switch on the Master Unit is set to ON, but a verification error may occur due
to the incorrectly set Slave registration table.
4-2-5
Allocations for Master Unit in PLC
The following table shows the words in the CPU Unit that are related to the
Master Unit.
Data area
Bit(s)
Name
Function
Auxiliary
Area (A)
A33000 to
A33515
Special I/O Unit Restarting
Flags
These flags are turned ON while a Special I/O Unit is
restarting. Each bit corresponds to the Unit with the same
unit number.
A40113
Dual Number Use Error Flag
(Fatal Error)
This flag is turned ON in the following situations:
When the same unit number has been set on more than
one CS1 CPU Bus Unit.
When the same unit number has been set on more than
one Special I/O Unit.
When the same word is allocated more than once for Basic
I/O Units.
A40206
Special I/O Unit Error Flag
This flag is turned ON when the same unit number has
been set on more than one Special I/O Unit, or when an
error has occurred during data transfer between the PLC
and the Special I/O Unit. The unit number of the Unit is writ-
ten to word A418.
A41100 to
A41615
Special I/O Unit Number
Duplication Flags
These flags are turned ON when the same unit number has
been set on more than one Special I/O Unit (i.e., when
A40113 is ON). Each bit corresponds to the Unit with the
same unit number.
A41800 to
A42315
Special I/O Unit Error Flags
These flags are turned ON when the same unit number has
been set on more than one Special I/O Unit, or when an
error has occurred during data transfer between the PLC
and the Special I/O Unit. Each bit corresponds to the Unit
with the same unit number.
A50200 to
A50715
Special I/O Unit Restart Bits
Turn the corresponding bit ON and then OFF to restart a
Special I/O Unit. Each bit corresponds to the Unit with the
same unit number.
PLC Setup
22600 to
23115
Special I/O Unit Refresh Dis-
able Bits
Turn the corresponding bit ON to disable refreshing of the
corresponding Special I/O Unit (except those on Slave
Racks).