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SIPLACE GEM SW Version GEM 505.01 HOST Interface Manual Page 156 of 236 ©Siemens AG, all rights reserved 5.9.2 Messages Spooled and Transmitted Assumption: Spool State is "Spool Inactive". Step SECS Message Des…

SIPLACE GEM SW Version GEM 505.01

HOST Interface Manual

5.9 Spooling

For all of the spooling scenarios, spooling is meaningful only when Control State

(CONTROLSTATE = 4 or 5) is "On-Line". When CONTROLSTATE is "Off-Line"

(CONTROLSTATE = 1, 2, or 3), Equipment sends only stream one primaries and SnF0

secondaries, neither of which are eligible for spooling.

5.9.1 Host Enables Spooling of Messages

Step SECS Message Description

1. H -> E S2F43 W Host requests that messages be eligible for

spooling using the following message:

S2F43 W * H -> E

<L [2]

<U1 STRID> * Msg Stream

<U1 FCNID> * Msg Fcn

...

> .

2. H <- E S2F44 The Equipment enables spooling for the

messages requested by the Host. Response

has RSPACK set to zero as follows:

S2F44

<L [2]

<B [1] 00> * RSPACK

<L>

> .

SIPLACE GEM SW Version GEM 505.01 HOST Interface Manual

5.9.2 Messages Spooled and Transmitted

Assumption: Spool State is "Spool Inactive".

Step SECS Message Description

1. H <- E SnFn Equipment attempts to send any message to

the Host.

2. After failure to deliver message, the Equipment

assumes that the link is down, and will start to

spool all messages marked for spooling. The

first message spooled is the collection event

“SpoolActivated“.

3. H <- E S1F13 W Equipment attempts to establish

communications. This message will repeat

every „EstablishCommunicationsTimer“

seconds until successful.

4. H -> E S1F14 Communications established.

Communications state transits to

„Communicating“. If COMMACK is not zero,

communications are not established and

scenario proceeds at step 3.

5. H -> E S6F23 W Host requests that Equipment begin

despooling messages. RSDC is zero in this

message.

6. H <- E S6F24 Equipment indicates that it will start to send

spooled messages with return code RSDA =

0x00.

7. Equipment will start to despool messages.

This process is single-threaded. That is, when

Equipment sends a de-spooled message with

the W-bit set to „1“, Equipment must be

receive the Host reply before the Equipment

will send next despooled message. If EC

„MaxSpoolTransmit“ is zero, all messages will

be transmitted. If it is set to another number,

this number of messages will be sent. The

Equipment will await the next S6F23 to send

the next messages.

8. H <- E S6F11 W The Equipment signals CEID

GemSpoolActivated. This was the first

message in the spool if it was not over-written.

9. H -> E S6F12 Host acknowledges the start of the spool

transfer.

10. Equipment will de-spool messages one at a

time from oldest to youngest until one of the

following criteria is met: 1) All messages have

been transmitted (go to step 13); or 2) When

„MaxSpoolTransmit“ is not zero, and the

messages transmitted has reached

MaxSpoolTransmit limit (go to step 11).

Some spooled messages (usually multi-block)

consist of a SECS conversation of type

„Inquire, Grant, Send, Acknowledge“. During

SIPLACE GEM SW Version GEM 505.01

HOST Interface Manual

de-spool, if the Host rejects the Inquire, the

multi-block message is removed from the

spool and not transmitted. Despooling

continues.

11. H -> E S6F23 W The Host requests that the Equipment

continue de-spooling messages.

12. H <- E S6F24 Equipment indicates that it will start to send

spooled messages with return code RSDA =

0x00. Go to step 10.

13. H <- E S6F11 W Equipment notifies the Host that sending of

spooled messages has been completed by

sending CEID GemSpooling Deactivated.

14. H -> E S6F12 Host acknowledges that the spool has been

cleared and is deactivated.

5.9.3 Host Purges Spool

Assumption: spool state is "Spool Active"

Step SECS Message Description

1. H -> E S6F23 W Host sends S2F23, requesting that spool be

discarded with RSDC set to one.

2. H <- E S6F24 Equipment deletes spooled data and returns

RSDA code zero.