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Section 4
4.4 Message specifications
V700-L21
User's Manual
Section 4
SECS Protocol Specifications
*1: "PS" is an extension command of the CIDRW system.
*2: Will be zero-length item if TARGETID is "00" (CIDRW).
*3: "EE", "HE" and "TE" are used only for S18F6, S18F8, S18F10 and S18F12.
<About S9F7 response>
When a message with an illegal format from the upstream controller is received, the S9F7 is returned to the
upstream controller. "Illegal format" refers to a one whose message structure has a problem such as an illegal
attribute, or excessive or insufficient items. In the case of problematic item content, SSACK = "CE"
(communications error) will be returned to the upstream controller.
(2) Data item dictionary
SECS II data item Name Format Value
ATTRID Attribute ID 20 Attribute name
ATTRVAL Attribute value 20 Attribute value
MID Carrier ID 20 (16 bytes fixed) All characters 00H-0FFH
DATA Data 20 (8 bytes fixed) All characters 00H-0FFH
DATALENGTH Data size 52 8 (fixed)
DATASEG Data segment 20 "S01", "S02",⋅⋅⋅"S27", "S28"
STATUS PMInformation 20 NE: normal (fixed)
SSACK Result information 20 NO: normal
EE: execute error *3
CE: communication error
HE: hardware error*3
TE: tag error *3
List of STATUS Status L,4
1.<PM Information>
2.<Alarm Status>
3.<Operational Status>
4.<Head Status> *2
PM Information contains the STATUS value.
CPVAL State request parameter 20 "OP", "MT", "PS" *1
TARGETID Target ID 20 "00"-"31"
* "00" represents the CIDRW controller itself.
SSCMD Subsystem command 20 "Change State"
"Get Status"
"Perform Diagnostics"
"Reset"
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