CS1D-BC042D Omron, CS1D-BC042D Datasheet - Page 383

• 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

Computing the Cycle Time
Parallel Processing with Synchronous Memory Access (Single CPU Systems Only)
Program Execution Cycle
Peripheral Servicing Cycle
Time
348
The program execution cycle time depends on the same conditions as the
Normal Mode. Partial peripheral servicing ((5) below), however, is restricted to
servicing for file and I/O memory access.
The program execution cycle time is the total time required for the PLC to per-
form the 5 operations shown in the following tables.
Cycle time = (1) + (2) + (3) + (4) + (5)
The peripheral servicing execution cycle time depends on the same condi-
tions as the Parallel Processing with Asynchronous Memory Access. Periph-
eral servicing ((2) below), however, is restricted to servicing that does not
access I/O memory.
The peripheral servicing cycle time is the total time required for the PLC to
perform the 2 operations shown in the following tables.
Cycle time = (1) + (2)
(1)
(2)
(3)
(4)
(5)
(1)
(2)
Overseeing
Program exe-
cution
Cycle time
calculation
I/O refreshing Same as for Normal Processing Mode. Same as for Normal
Partial
peripheral
servicing
Name
Overseeing
processing
Peripheral
servicing
I/O bus check, etc.
Same as for Normal Mode.
Waits for the specified cycle time.
Servicing file access (Memory Card or
EM file memory)
Performs
services for
the events
give at the
right that
requires I/
O memory
access
Checks user program memory,
checks for battery errors, etc.
Performs
services for
the events
give at the
right,
excluding
those that
require I/O
memory
access.
Details
Events with CS-series
Special I/O Units (does
not include I/O refreshing)
Events with CS-series
CPU Bus Units (does not
include I/O refreshing)
Peripheral port events
RS-232C port events
Events with Inner Boards
Events using communica-
tions ports
Processing
Events with CS-series
Special I/O Units (does
not include I/O refresh-
ing)
Events with CS-series
CPU Bus Units (does
not include I/O refresh-
ing)
Peripheral port events
RS-232C port events
Events with Inner
Boards
Events using communi-
cations ports
0.4 ms
1.0 ms for each type of
service
If servicing ends before
1 ms has expired, the
next type of servicing
will be started immedi-
ately without waiting.
0.3 ms
Same as for Normal
Mode.
Same as for Normal
Mode.
Mode.
Same as for Normal
Mode.
Processing time and
Processing time and
fluctuation cause
fluctuation cause
Section 9-4