CS1D-BC042D Omron, CS1D-BC042D Datasheet - Page 364

• Manufacturer Part Number: CS1D-BC042D
• Description: CS1D Dual CPU Exp
• Manufacturer: Omron

Specifications of CS1D-BC042D

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

9-1
9-1-1
CPU Unit Operation Flow
CPU Unit Operation
Cycle time
CPU Unit Operation
General Flow for Duplex CPU Systems
Active CPU Unit
Duplex initialization
Duplex refresh
Startup
initialization
Duplex
initialization
Overseeing
processing
Program
execution
I/O refreshing
(even in
PROGRAM
mode)
Duplex bus check
Peripheral
servicing
Power ON
Note The CPU Units for Duplex CPU Systems do not support parallel processing
Operation processing: Execute the user program.
Error processing: Turn OFF outputs. (Reset Units for bus
errors.)
After error: Clear I/O memory is an error occurs (unless a
FALS(007) instruction created the error).
Following services executed if an event
has occurred.
Special I/O Unit event service
CPU Bus Unit event service
Peripheral port service
RS-232C port service
Inner Board event service
File access service
Communications port service
Initialize hardware
memory and system
work area.
Detect I/O.
Automatically transfer
data from Memory
Card.
Data is transferred from the active CPU Unit
to the standby CPU Unit and verified.
Check the Battery.
Check for Memory
Card and other
devices.
The following flowchart shows the overall operation of the CPU Units in a
Duplex CPU System.
This section describes the internal operation of the CPU Unit and the cycle
used to perform internal processing. After the instructions in the user program
have been executed, I/O is refreshed and peripherals are services. These
operations are then repeated cyclically.
modes.
Cyclic data refresh for the following Units
1. Basic I/O Units
2. Special I/O Units (refreshing allocated
words in CIO and DM Areas and specific
Unit data)
3. CPU Bus Units (refreshing allocated
words in CIO and DM Areas and specific
Unit data)
Read DIP switch settings.
Check I/O bus.
Check user program
memory.
Not normally performed.
Verify actual Units with
registered I/O tables.
Clear I/O memory.
Check user memory.
Clear forced status,
etc.
Duplex synchronization completed.
Duplex synchronization started
Data transfer
Data transfer
Duplex
initialization
Startup
initialization
Standby CPU Unit
Overseeing
processing
Program
execution
Peripheral
servicing
On standby for
synchronization
processing
Duplex initialization
Power ON
Operation processing: Execute the user program.
Error processing: Turn OFF outputs. (Reset Units for bus
errors.)
After error: Clear I/O memory is an error occurs (unless a
FALS(007) instruction created the error).
Peripheral port service
RS-232C port service
Data is transferred from the active CPU Unit
to the standby CPU Unit and verified.
Initialize hardware
memory and system
work area.
Detect I/O.
Automatically transfer
data from Memory
Card.
Check the Battery.
Check for Memory
Card and other
devices.
Read DIP switch settings.
Check I/O bus.
Check user program
memory.
Not normally performed.
Verify actual Units with
registered I/O tables.
Clear I/O memory.
Check user memory.
Clear forced status,
etc.
Section 9-1
329