Communication
GTW/EN
CT/C40
PACiS Gateway
Page 31/64
4.1.4
Error check field
The error-checking field contains a 16-bit value implemented as two 8-bit bytes [low
significant byte first]. The error check value is the result of a Cyclical Redundancy Check
[CRC] calculation performed on the message contents.
The gateway does not reply to corrupted data messages, i.e when the CRC is not correct or
when parity is not correct.
4.2 Slave
responses
4.2.1
When the slave answers
Except for broadcast messages (no response in this case), when a master device sends a
query to a slave device it expects a normal response.
One of four possible events can occur from the master’s query:
-
If the slave device receives the query without communication error, and can handle
the query normally, it returns a normal response.
-
If the slave does not receive the query due to a communication error, no response is
returned. The master program will process a timeout condition for query.
-
If the slave receives the query, but detect a communication error [ bad CRC or framing
error for example ], no response is returned. The master program will process a
timeout condition for query.
-
If the slave device receives the query without communication error, but cannot handle
it, the salve will return an exception response informing the master of the nature of the
error.
Содержание GTW/EN T/C40
Страница 1: ...PACiS GTW Gateway GTW EN T C40 Version 4 5 Technical Guide ...
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Страница 4: ...GTW EN T C40 Technical Guide Page 2 2 PACiS GTW gateway BLANK PAGE ...
Страница 5: ...Safety Handling GTW EN SA C40 PACiS GTW gateway SAFETY HANDLING ...
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Страница 8: ...GTW EN SA C40 Safety Handling Page 2 8 PACiS GTW gateway BLANK PAGE ...
Страница 14: ...GTW EN SA C40 Safety Handling Page 8 8 PACiS GTW gateway BLANK PAGE ...
Страница 15: ...Technical Data GTW EN TD C40 PACiS GTW gateway TECHNICAL DATA ...
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Страница 31: ...Introduction GTW EN IT C40 PACiS GTW Gateway INTRODUCTION ...
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Страница 40: ...GTW EN IT C40 Introduction Page 8 8 PACiS GTW Gateway BLANK PAGE ...
Страница 41: ...Hardware Description GTW EN HW C40 PACiS GTW gateway HARDWARE DESCRIPTION ...
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Страница 51: ...Connection GTW EN CO C40 PACiS Gateway CONNECTION ...
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Страница 54: ...GTW EN CO C40 Connection Page 2 8 PACiS Gateway BLANK PAGE ...
Страница 60: ...GTW EN CO C40 Connection Page 8 8 PACiS Gateway BLANK PAGE ...
Страница 61: ...Installation GTW EN IN C40 PACiS Gateway INSTALLATION ...
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Страница 64: ...GTW EN IN C40 Installation Page 2 30 PACiS Gateway BLANK PAGE ...
Страница 82: ...GTW EN IN C40 Installation Page 20 30 PACiS Gateway Don t forget to click on the Apply button ...
Страница 93: ...Human Interface GTW EN HI C40 PACiS GTW gateway HUMAN INTERFACE ...
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Страница 106: ...GTW EN HI C40 Human Interface Page 12 12 PACiS GTW gateway BLANK PAGE ...
Страница 107: ...Communication GTW EN CT C40 PACiS Gateway COMMUNICATION ...
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Страница 173: ...Commissioning GTW EN CM C40 PACiS GTW gateway COMMISSIONING ...
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Страница 176: ...GTW EN CM C40 Commissioning Page 2 4 PACiS GTW gateway BLANK PAGE ...
Страница 179: ...Record Sheet GTW EN RS C40 PACiS GTW gateway RECORD SHEET ...
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Страница 182: ...GTW EN RS C40 Record Sheet Page 2 6 PACiS GTW gateway BLANK PAGE ...
Страница 187: ...Maintenance GTW EN MF C40 PACiS GTW gateway MAINTENANCE ...
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Страница 256: ...GTW EN MF C40 Maintenance Page 68 68 PACiS GTW gateway BLANK PAGE ...
Страница 257: ...Problem Analysis GTW EN PR C40 PACiS GTW gateway PROBLEM ANALYSIS ...
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Страница 259: ...Problem Analysis GTW EN PR C40 PACiS GTW gateway Page 1 4 CONTENT 1 SCOPE OF THE DOCUMENT 3 2 PROBLEM IDENTIFICATION 4 ...
Страница 260: ...GTW EN PR C40 Problem Analysis Page 2 4 PACiS GTW gateway BLANK PAGE ...
Страница 263: ...Functional Description GTW EN FT C40 PACiS Gateway FUNCTIONAL DESCRIPTION ...
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Страница 277: ...Logical Diagram GTW EN LG C40 PACiS GTW gateway LOGICAL DIAGRAM ...
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Страница 285: ...Glossary GTW EN LX C40 PACiS GTW gateway GLOSSARY ...
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Страница 287: ...Glossary GTW EN LX C40 PACiS GTW gateway Page 1 10 CONTENT 1 INTRODUCTION 3 2 LEXICAL 4 ...
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