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S I P L A C E G EM S W V e r s i on G EM 505 . 03 SP 1 H O S T I n t e r f a c e M anua l P age 140 o f 241 ©S i e m en s A G, a ll r i gh t s r e s e r v ed 4 . 16 S t r ea m 14 no t u s ed

SIPLACE GEM SW Version GEM 505.03 SP1 HOST Interface Manual

4.15 Stream 13

not used

SIPLACE GEM SW Version GEM 505.03 SP1 HOST Interface Manual

4.16 Stream 14

not used

SIPLACE GEM SW Version GEM 505.03 SP1 HOST Interface Manual

5 SECS Scenarios

Unless otherwise noted in this section, the Communications State is "Communicating"

and the Control state is either "On-Line/Local" or "On-Line/Remote".

5.1 Equipment Communications

5.1.1 Equipment Establishes Communications

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 „{XE

„EstablishCommunicationsTimer“}ESTABLISH

COMMUNICATIONSTIMER“ seconds, then go

to step 1.

3. H -> E S1F14 The Host responds with Establish

Communications Acknowledge. If {XE

„COMMACK“}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.