Omron CJ1W-CT021 Operation Manual page 11

About this Manual:
This manual describes the installation and operation of the CJ1W-CT021 High-speed Counter Unit and
includes the sections described below. Please read this manual carefully and be sure you understand the
information provided before attempting to install or operate the CJ1W-CT021 High-speed Counter Unit.
Be sure to read the precautions provided in the following sections.
Section 1 introduces the CJ1W-CT021 High-speed Counter Unit and describes the features, functions,
and specifications. It gives short instructions on how to operate the Units.
Section 2 provides information about components, wiring and installing the CJ1W-CT021 High-speed
Counter Unit.
Section 3 provides information about the configuration and operation of the CJ1W-CT021 High-speed
Counter Unit.
Section 4 provides information on the data-exchange and the communication interface between the
CJ1W-CT021 High-speed Counter Unit and the CPU.
Section 5 provides details of the CJ1W-CT021 High-speed Counter Unit's errors, error -codes and indica-
tors and guidelines for troubleshooting.
Section 6 provides sample programs, according to practical applications, that can be used with the
CJ1W-CT021 High-speed Counter Unit.
The Appendices describe a comparison with C200H-CT021 High-speed Counter Unit, the numbering of
Terminal Block Units, the numbering of External Interrupt Tasks to Outputs and a description of the
Response Time.
All through this manual where a double word is defined as for instance "n+2, n+3" this must be interpreted
as follows:
sign
0 = + (positive)
F = - (negative)
7
x16
LSW = Least Significant Word
MSW = Most Significant word
n+3 (MSW)
6 5 4
x10 x10 x10
n+3 (MSW)
6 5 4
x16 x16 x16
n+2 (LSW)
3 2 1
x10 x10 x10
n+2 (LSW)
3 2 1
x16 x16 x16
0
x10 :BCD Double Word
0
x16 :Hexadecimal Double Word
xi