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Automatic control function programming manual ladder language

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15.3.8 «READ-BLOCK» Request<br />

Used to read a part programme block.<br />

Request format<br />

REQUEST CODE<br />

(1 byte)<br />

0xF5<br />

PROGRAMME NUMBER<br />

(1 long word)<br />

(See REMARK)<br />

BLOCK NUMBER<br />

(1 word)<br />

BLOCK OFFSET<br />

(1 word)<br />

ADDITIONAL<br />

REQUEST CODE<br />

(1 byte)<br />

0x50<br />

Exchanges by Protocol<br />

REMARK The «PROGRAMME NUMBER» field indicates the number of the part programme<br />

indexed by the axis group (Part programme No. x 10 + axis group No.).<br />

Answer format<br />

Positive answer<br />

ANSWER CODE<br />

(1 byte)<br />

0xF5<br />

BLOCK LENGTH<br />

(1 word)<br />

DATA<br />

ADDITIONAL<br />

ANSWER CODE<br />

0x80<br />

REMARK The «DATA» filed can contain up to 119 bytes and ends with (LF).<br />

Negative answer<br />

ANSWER CODE<br />

(1 byte)<br />

0xF5<br />

ADDITIONAL<br />

ANSWER CODE<br />

0x80<br />

For this request, the answer code and additional answer code are not significant. The execution report is given by<br />

the code returned in the uniti() <strong>function</strong> (see Sec. 15.4.2).<br />

en-938846/8 15 - 25<br />

15

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