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ABB LD MTR-01 63940135F Power supply board

¥668.00

Part Number:LD MTR-01 63940135F

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Description

The Serial Port Setup COMMREQ function 65520 (FFF0 hex) may be used to activate a serial

communication protocol for a serial port, overriding the protocol that was specified in the port

settings of the CPU configuration. The COMMREQ installed protocol remains active as long as the CPU

is in RUN Mode. When the CPU is STOPped, the COMMREQ installed protocol is removed, and the

protocol settings from the CPU configuration are reactivated.

The COMMREQ requires that all its command data be placed in the correct order (in a command

block) in the CPU memory before it is executed. The COMMREQ should be executed by a contact of a

one-shot coil to prevent sending the data multiple times. For details on the operands and command

block format used by the COMMREQ function, refer to PACSystems RX7i and RX3i CPU Programmer’s

Reference Manual, GFK-2950 Chapter 4.

The COMMREQ uses the following TASKs to specify the port for which the operation is intended:

task 19 for COM1

task 20 for COM2

Note: Because address offsets are stored in a 16-bit word field, the full range of %W memory type

cannot be used with COMMREQs.

6.1.1 COMMREQ Function Example

In the example, when %M0021 is ON, a Command Block located starting at %R0032 is sent to COM2

(communications task 20) of the CPU (rack 0, slot 0). If an error occurs processing the COMMREQ,

%Q0110 is set.

The Machine Edition programming software safeguards against the download of some hardware

configurations that would prevent the programmer from communicating serially with the CPU. In a

system that does not have an embedded Ethernet module, if a rack-based Ethernet is not present, a

serial connection is required for programmer communications.

For CPE305/CPE310 CPUs, which have an embedded Ethernet port that, when configured, is available

for programmer communications, the safeguards on serial port configurations are still enforced.

 

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Contact Us:+86 18106937731
Whatapp:+86 15359293870
Email: geabbdcs@gmail.com / 2872270648@qq.com
Contact Person: Chen

 

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