Data Transfer With The Cpu Unit; Restart Bits - Omron SYSMAC CV500-BSC11 Operation Manual

Data Transfer with the PC

3-1-4 Restart Bits

Caution
!
3-2

Data Transfer with the CPU Unit

30
A Restart Bit is turned ON to restart a BASIC Unit. A001 contains Restart Bits for
the CPU Bus Units. To restart a BASIC Unit, turn the corresponding bit of this
area ON, and then back OFF again. These bits can be manipulated using the
SET(016) ladder-diagram instruction or from a Programming Device. The bit
number within this word corresponds to the unit number as shown below.
Bit 15
A001
Note Unit numbers or memory switch setting cannot be changed by restarting a BA-
SIC Unit using its Restart Bit. To change the unit number of memory switches,
restart the Unit by resetting the CPU Unit.
When routing tables are transferred to the CPU Unit, the corresponding Restart
Bit will turn ON and the BASIC Unit will stop.
To transfer data between the BASIC Unit and CPU Unit, the following three
methods are available. With each method, data is read and written using the PC
READ and PC WRITE commands from the BASIC Unit. Programming the CPU
Unit is not necessary. When desired, programming is also possible from the
CPU Unit.
Data transfer
Cyclic Specified words in the CPU Unit, set in advance using the
software switches in the CPU Unit, are read or written during
cyclic servicing. Since different areas can be simultaneously read
and written, this method is used to transfer data when the same
data needs to be transferred repeatedly. The output status from
the CPU Unit to the BASIC Unit and the input status from the
BASIC Unit to the CPU Unit is transferred or received using cyclic
transfer. Software switches can be set to disable cyclic transfers.
Event Specified data is read from or written to the CPU Unit when
required. This method is most frequently used to transfer data.
CPU bus links CPU bus links can be used to transfer small quantities of data
with another BASIC Unit or the CPU Unit at high speeds. This
method is used to operate the BASIC Unit in synchronization with
another BASIC Unit or the CPU Unit, or to broadcast data to all
other Units and the CPU Unit. CPU bus links are disabled in the
default settings, but time information in the CPU Bus Link Area
can be accessed. To specify CPU bus links, use the computer
with terminal mode.
Bit 0
Unit no. 0 Restart Bit
Unit no. 1 Restart Bit
Unit no. 2 Restart Bit
Unit no. 3 Restart Bit
Unit no. 4 Restart Bit
Unit no. 5 Restart Bit
Unit no. 6 Restart Bit
Unit no. 7 Restart Bit
Unit no. 8 Restart Bit
Unit no. 9 Restart Bit
Unit no. 10 Restart Bit
Unit no. 11 Restart Bit
Unit no. 12 Restart Bit
Unit no. 13 Restart Bit
Unit no. 14 Restart Bit
Unit no. 15 Restart Bit
Application
Section 3-2