Free Running Timer - Omron SYSMAC CS1D-PD Series Operation Manual

CS1D Duplex System Overview and Features

Free Running Timer

New Special Instructions and Functions
10
The system timers used after the power is turned ON are contained in the fol-
lowing Auxiliary Area words.
Name
10-ms Incrementing
Free Running Timer
100-ms Incrementing
Free Running Timer
1-s Incrementing Free
Running Timer
Note The timer will continue to be incremented when the operating mode is
switched to RUN mode.
Example: The interval can be counted between processing A and processing B
without requiring timer instructions. This is achieved by calculating the
difference between the value in A000 for processing A and the value in
A000 for processing B. The interval is counted in 10 ms units.
CPU Units with unit version 4.0 and later also have a 1-s timer in A002,
which is incremented by 1 every 1 s.
The following new instructions and instruction functions have been added. For
details, refer to the CS/CJ Series Instructions Reference Manual (W474).
These new instructions are supported by the CX-Programmer Ver. 9.7 or
higher only.
• Serial communications instructions (CS1D-CPU@@SA only):
Supporting no-protocol communications with Serial Communications
Units with unit version 1.2 or later:
TXDU(256): TRANSMIT VIA SERIAL COMMUNICATIONS UNIT
RXDU(255): RECEIVE VIA SERIAL COMMUNICATIONS UNIT
Supporting no-protocol communications with Serial Communications
Boards with unit version 1.2 or later:
TXD(236): TRANSMIT
RXD(235): RECEIVE
Address Function
A000 This word contains the system timer
used after the power is turned ON.
0000 hex is set when the power is
turned ON and this value is automat-
ically incremented by 1 every 10 ms.
The value returns to 0000 hex after
reaching FFFF hex (655,350 ms),
and then continues to be automati-
cally incremented by 1 every 10 ms.
A001 This word contains the system timer
used after the power is turned ON.
0000 hex is set when the power is
turned ON and this value is automat-
ically incremented by 1 every 100
ms. The value returns to 0000 hex
after reaching FFFF hex (6,553,500
ms), and then continues to be auto-
matically incremented by 1 every
100 ms.
A002 This word contains the system timer
used after the power is turned ON.
0000 hex is set when the power is
turned ON and this value is automati-
cally incremented by 1 every second.
The value returns to 0000 hex after
reaching FFFF hex (65,535 s), and
then continues to be automatically
incremented by 1 every second.
Section 1-1
Access
Read-only
Read-only
Read-only