User`s manual

CHAPTER 1 OVERVIEW

1.1 Overview

CHAPTER 1 OVERVIEW

1.1 Overview

This manual explains special functions of the MELSEC-Q/L series C24.

When applying the following program examples to the actual system, make sure to examine the applicability and

confirm that it will not cause system control problems.

This chapter provides an overview of these special functions.

The primary special functions of the Q series C24 and a functional overview are indicated below.

(1) Monitoring the programmable controller CPU ( Page 34, CHAPTER 2)

(a) The local station programmable controller CPU can be monitored at time intervals

set by the user without a sequence program.

• The following information can be registered as items to be monitored. (Monitoring a device for the local

station programmable controller CPU)

• A numeric value stored in a word device

• The ON/OFF status of a bit device (Monitoring the status of the local station programmable controller

CPU)

• Monitoring the status of the local station programmable controller CPU

• For the results of the programmable controller CPU monitoring, the following monitored information can be

transmitted/notified.

• Transmission of information on the device to be monitored and status of the programmable controller CPU

(Monitoring information obtained through combined use of the modem function can also be transmitted.)

• Notification of notification messages (character string data) registered for connecting the modem function

when using with the modem function together

• The user can select one of the following as transmission timing for the programmable controller CPU

monitoring results to the external device.

• Transmission/notification each time the programmable controller CPU is monitored. (Constant cycle

transmission)

• Transmission/notification when the information read from the programmable controller CPU agrees with

conditions set by the user. (Condition agreement transmission)