Omron V700-HMD13 series - Page 52

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Section 4
4.4 Message specifications
V700-L21
User's Manual
Section 4
SECS Protocol Specifications
S18,F1 Read attribute request S,H→E,reply
L,2
1.<TARGETID> "00"-"31"
2.L,n
1.<ATTRID1>
.
n.<ATTRIDn>
• If all the attributes (CIDRW controller or head) are to be read, then set n=0.
S18,F2 Read attribute data S,H←E
L,4
1.<TARGETID> "00"-"31"
2.<SSACK>
3.L,n
1.<ATTRVAL1>
.
n.<ATTRVALn>
4.L,s
1.<STATUS1>
.
s.<STATUSs>
• The order of attribute data is in accordance with the attribute ID defined by S18 and F1.
* If reading of all attributes is specified, then unsupported attributes (ATTRVAL) are skipped.
• When specified target is invalid:
n=0, s=0, SSACK = CE (communications error)
• When one or more undefined attributes are included:
n=0, s=0, SSACK = CE (communications error)
• If target =00 and when head attribute is specified, or the CIDRW controller attribute is specified with target < >00:
n=0, s=0, SSACK = CE (communications error)
• When SSACK is other than NO (normal), the List of Status will take a list structure with which the number of items is 0.