00192402-01 - 第130页
GEM for SIPLACE V7.01 Page 130 of 251 ©Siemens AG, all rights r eserved 6(&66FHQDULRV Unless otherwise noted in this section, the Com m unications State is "Com munic ating" and the Control state is eit…
GEM for SIPLACE V7.01
©Siemens AG, all rights reserved page 129 of 251
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GEM for SIPLACE V7.01
Page 130 of 251 ©Siemens AG, all rights reserved
6(&66FHQDULRV
Unless otherwise noted in this section, the Communications State is "Communicating"
and the Control state is either "On-Line/Local" or "On-Line/Remote".
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Assumption: Equipment's Communication state is "Enabled/Not Communicating".
Step SECS Message Description
1. H <- E S1F13 W Equipment attempts to send Establish
Communications Request.
2. If the send is not successful, or if no reply is
received from the Host, wait
„ESTABLISHCOMMUNICATIONSTIMER“
seconds, then go to step 1.
3. H -> E S1F14 The Host responds with Establish
Communications Acknowledge. If COMMACK
in this message is non-zero, wait
„ESTABLISHCOMMUNICATIONSTIMER“
seconds, then go to step 1. If COMMACK is
zero, proceed to the next step.
4. Communications is successfully established.
The Equipment changes its communication
state to Communicating. Normal SECS
message processing begins.
GEM for SIPLACE V7.01
©Siemens AG, all rights reserved page 131 of 251
+RVW(VWDEOLVKHV&RPPXQLFDWLRQV
Assumption: Equipment's Communication state is either "Enabled/Not Communicating"
or "Enabled/Communicating".
Step SECS Message Description
1. H -> E S1F13 W Host sends Establish Communications
Request.
2. H <- E S1F14 The Equipment responds with Establish
Communications Acknowledge, with
COMMACK set to zero. After this message is
successfully sent, communications is
established. If the current communication state
is „Not Communicating“, the Equipment
changes its communication state to
„Communicating“. If the state is
„Communicating“, no change in communication
state occurs. In either case, subsequently
received messages are processed normally.
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Assumption: Equipment's Communication state is "Enabled/Not Communicating".
Step SECS Message Description
1. H <- E S1F13 W Equipment sends Establish Communications
Request.
2. H -> E S1F13 W Host sends Establish Communications
Request.
3. H <- E S1F14 The Equipment responds with Establish
Communications Acknowledge, with
COMMACK set to zero. After this message is
successfully sent, communications is
established. The Equipment changes its
communication state to Communicating.
4. H -> E S1F14 The Host responds with Establish
Communications Acknowledge, with
COMMACK set to zero. This step could occur
before step 3, in which case communications
would be established at this step.