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TECHNICAL NOTE

ASCII CHARACTER INPUT Function Block

Function block for MP2000 series

<ASCIIIN> Function Block Summary

This function block receives a sequence of 7-bit or 8-bit ASCII characters of a specified size through the

controllers serial port, RS232 or RS422/485 from a transmitter device. This sequence of characters is

then stored in table format at an offset global MW register location.

Function Block Diagram

<ASCIIIN> Function Block Operation Notes

• To use the function block, the EXECUTE bit must be held ON.

• If the EXECUTE bit goes off during operation, the block will stop receiving data.

• On the rising edge of the EXECUTE input, the following two are executed. The

EXECUTE input should be maintained ON while in operation.

o The set value of START and SIZE are read.

o The storage table is initialized by data H2020(Null).

• ERROR–ID output has been added to better troubleshoot communication

problems. A zero in the value means no errors or block disabled.

• Protocol settings must be configured in controller module setup and transmitter

setup, and must match (baud rate, parity, stop bit, # data bits).

• This ASCIIin function block uses a MSG-RCV an embedded function. Since the

transmission protocol is set to none (internal setting =3(no procedure 2)(The data

of each byte is transferred according to a no procedure)), the Master/Slave

setting in module configuration is not necessary.

File: MP2000_IndividualFunctionDocument_RevC 154/168

Doc Number: eng.MCD.05.101 11/17/2005

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Yaskawa MP2000 Bedienungsanleitung Seite 154