IDENT-I • IVI-KHA6-4HRX, IVI-KHD2-4HRX
Operating control interface units using the 3964R protocol
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
epperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com
Date of issue 27.08.2001
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8.2 Command interpreter, systems for fixed code and read/write commands
8.2.1 Command structure
The mode commands described below behave in the same way as the corresponding
standard commands. For each mode command received, with the exception of the
RST command, the control interface unit responds with a message transmitting the
status of the control interface unit. The commands are transmitted to the control inter-
face unit in the form of data in a SEND message. The commands are encoded byte
by byte. The control interface unit acknowledges the commands with a further SEND
message, in which the status corresponding to the command is transmitted.
8.2.2 Mode commands
Bild 8.8: Mode commands
Bild 8.9: Structure of a mode command
Bild 8.10: Structure of the response message in reply to the transmitted mode command
Example: Correct transmission of the "Double-sided read" command
Description Hex identifier Parameter
Reset 01h 00h
Double-sided read 02h 00h
Set data carrier type
(only read/write commands)
44h 01h ... 04h
Byte 1 Byte 2
Mode command Parameter
Byte 1 Byte 2
Mode command Status/Error
Transmitted to the control interface unit: '02 00'
Transmitted to the control system: '02 00'
No message is transmitted in response to an RST command!
}
}
}
}
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