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.
Summary of Contents for GTW/EN T/C40
Page 1: ...PACiS GTW Gateway GTW EN T C40 Version 4 5 Technical Guide ...
Page 2: ......
Page 4: ...GTW EN T C40 Technical Guide Page 2 2 PACiS GTW gateway BLANK PAGE ...
Page 5: ...Safety Handling GTW EN SA C40 PACiS GTW gateway SAFETY HANDLING ...
Page 6: ......
Page 8: ...GTW EN SA C40 Safety Handling Page 2 8 PACiS GTW gateway BLANK PAGE ...
Page 14: ...GTW EN SA C40 Safety Handling Page 8 8 PACiS GTW gateway BLANK PAGE ...
Page 15: ...Technical Data GTW EN TD C40 PACiS GTW gateway TECHNICAL DATA ...
Page 16: ......
Page 31: ...Introduction GTW EN IT C40 PACiS GTW Gateway INTRODUCTION ...
Page 32: ......
Page 34: ...GTW EN IT C40 Introduction Page 2 8 PACiS GTW Gateway BLANK PAGE ...
Page 40: ...GTW EN IT C40 Introduction Page 8 8 PACiS GTW Gateway BLANK PAGE ...
Page 41: ...Hardware Description GTW EN HW C40 PACiS GTW gateway HARDWARE DESCRIPTION ...
Page 42: ......
Page 44: ...GTW EN HW C40 Hardware Description Page 2 8 PACiS GTW gateway BLANK PAGE ...
Page 51: ...Connection GTW EN CO C40 PACiS Gateway CONNECTION ...
Page 52: ......
Page 54: ...GTW EN CO C40 Connection Page 2 8 PACiS Gateway BLANK PAGE ...
Page 60: ...GTW EN CO C40 Connection Page 8 8 PACiS Gateway BLANK PAGE ...
Page 61: ...Installation GTW EN IN C40 PACiS Gateway INSTALLATION ...
Page 62: ......
Page 64: ...GTW EN IN C40 Installation Page 2 30 PACiS Gateway BLANK PAGE ...
Page 82: ...GTW EN IN C40 Installation Page 20 30 PACiS Gateway Don t forget to click on the Apply button ...
Page 93: ...Human Interface GTW EN HI C40 PACiS GTW gateway HUMAN INTERFACE ...
Page 94: ......
Page 96: ...GTW EN HI C40 Human Interface Page 2 12 PACiS GTW gateway BLANK PAGE ...
Page 106: ...GTW EN HI C40 Human Interface Page 12 12 PACiS GTW gateway BLANK PAGE ...
Page 107: ...Communication GTW EN CT C40 PACiS Gateway COMMUNICATION ...
Page 108: ......
Page 172: ...GTW EN CT C40 Communication Page 64 64 PACiS Gateway BLANK PAGE ...
Page 173: ...Commissioning GTW EN CM C40 PACiS GTW gateway COMMISSIONING ...
Page 174: ......
Page 176: ...GTW EN CM C40 Commissioning Page 2 4 PACiS GTW gateway BLANK PAGE ...
Page 179: ...Record Sheet GTW EN RS C40 PACiS GTW gateway RECORD SHEET ...
Page 180: ......
Page 182: ...GTW EN RS C40 Record Sheet Page 2 6 PACiS GTW gateway BLANK PAGE ...
Page 187: ...Maintenance GTW EN MF C40 PACiS GTW gateway MAINTENANCE ...
Page 188: ......
Page 192: ...GTW EN MF C40 Maintenance Page 4 68 PACiS GTW gateway BLANK PAGE ...
Page 256: ...GTW EN MF C40 Maintenance Page 68 68 PACiS GTW gateway BLANK PAGE ...
Page 257: ...Problem Analysis GTW EN PR C40 PACiS GTW gateway PROBLEM ANALYSIS ...
Page 258: ......
Page 260: ...GTW EN PR C40 Problem Analysis Page 2 4 PACiS GTW gateway BLANK PAGE ...
Page 263: ...Functional Description GTW EN FT C40 PACiS Gateway FUNCTIONAL DESCRIPTION ...
Page 264: ......
Page 266: ...GTW EN FT C40 Functional Description Page 2 12 PACiS GTW gateway BLANK PAGE ...
Page 276: ...GTW EN FT C40 Functional Description Page 12 12 PACiS GTW gateway BLANK PAGE ...
Page 277: ...Logical Diagram GTW EN LG C40 PACiS GTW gateway LOGICAL DIAGRAM ...
Page 278: ......
Page 280: ...GTW EN LG C40 Logical Diagram Page 2 6 PACiS GTW gateway BLANK PAGE ...
Page 284: ...GTW EN LG C40 Logical Diagram Page 6 6 PACiS GTW gateway BLANK PAGE ...
Page 285: ...Glossary GTW EN LX C40 PACiS GTW gateway GLOSSARY ...
Page 286: ......
Page 287: ...Glossary GTW EN LX C40 PACiS GTW gateway Page 1 10 CONTENT 1 INTRODUCTION 3 2 LEXICAL 4 ...
Page 288: ...GTW EN LX C40 Glossary Page 2 10 PACiS GTW gateway BLANK PAGE ...
Page 297: ......