sepam 20 user manual - Schneider Electric
sepam 20 user manual - Schneider Electric
sepam 20 user manual - Schneider Electric
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Modbus communication Reading Sepam identification<br />
PCRED301005EN - 06/<strong>20</strong>08<br />
Presentation<br />
The "Read Device Identification" function is used to access in a standardized manner<br />
the information required to clearly identify a device.<br />
The description is made up of a set of objects (ASCII character strings).<br />
Sepam series <strong>20</strong> accepts the "read identification" function (conformity level 02).<br />
For a complete description of the function, go to www.modbus.org. The description<br />
below covers a subset of the function, adapted to Sepam series <strong>20</strong>.<br />
Implementation<br />
Request frame<br />
The request frame is made of the following components.<br />
Field Size (bytes)<br />
Slave number 1<br />
43 (2Bh) 1 Generic access function code<br />
14 (0Eh) 1 Read device identification<br />
01 or 02 1 Type of read<br />
00 1 Object number<br />
CRC16 2<br />
Sepam series <strong>20</strong> identification<br />
The type of read is used to select a simplified (01) or a standard (02) description.<br />
Reply frame<br />
The objects making up the Sepam series <strong>20</strong><br />
The reply frame is made of the following components.:<br />
identification are listed below.<br />
Field Size (bytes)<br />
Number Type Value Slave number 1<br />
0 VendorName "Merlin Gerin" or<br />
43 (2Bh) 1 Generic access function code<br />
"<strong>Schneider</strong> <strong>Electric</strong>"<br />
14 (0Eh) 1 Read device identification<br />
1 ProductCode Application EAN13 code 01 or 02 1 Type of read<br />
2 MajorMinorRevision Application version number<br />
02 1 Conformity level<br />
(Vxxyy)<br />
00 1 Continuation-frame flag (none for Sepam)<br />
3 VendorURL "www.schneider-electric.com" 00 1 Reserved<br />
4 ProductName "Sepam series <strong>20</strong>" n 1 Number of objects (according to read type)<br />
5 ModelName Application name<br />
0bj1 1 Number of first object<br />
(e.g. "M<strong>20</strong> Motor")<br />
lg1 1 Length first object<br />
6 UserAppName Sepam marking txt1 lg1 ASCII string of first object<br />
..... ...<br />
objn 1 Number nth object<br />
lgn 1 Length nth object<br />
txtn Ign ASCII string of nth object<br />
CRC16 2<br />
Exception frame<br />
If an error occurs during request processing, a special exception frame is sent.<br />
Field Size (bytes)<br />
Slave number 1<br />
171 (ABh) 1 Generic access exception (2Bh + 80h)<br />
14 (0Eh) 1 Read device identification<br />
01 or 03 1 Type of error<br />
CRC16 2<br />
5/33<br />
5
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