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GEM for SIPLACE V7.01 ©Siemens AG, all rights r eserved page 47 of 251  6SRROLQJ W hen the SECS link between the Host and the SIPLACE goes down (RT Y error on the Equipment s ide), the SIPLACE will spool appropriate…

GEM for SIPLACE V7.01

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The SIPLACE contains Clock/Calendar hardware, by which it knows the current date and

time.

The Host can send S2F31 to set the Equipment's Clock/Calendar hardware.

The Host can send S2F17 to read the Equipment's Clock/Calendar hardware.

The Operator can initiate a Date/Time request from the Host. The Equipment will send

S2F17 to the Host and will set its clock according to the data in the S2F18 reply.

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The following table lists the variables (SV's, EC's, or DVVALS) which are relevant to

material movement. For a more complete description of these variables, see "Appendix A

-- Variables".

Variable Name VID

CLOCK 1002022

TIME 1002023

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There are no CEID related to the Clock Capability.

GEM for SIPLACE V7.01

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When the SECS link between the Host and the SIPLACE goes down (RTY error on the

Equipment side), the SIPLACE will spool appropriate messages so that the Host can read

them once the link comes back up (after a successful Connect Request transaction).

The Host can set spooling attributes on the SIPLACE by setting certain Equipment

Constants with the S2F15/16 transaction.

The Host can define streams and functions of messages to be spooled through the

S2F43/44 transaction. Stream one (S1Fx) messages are not eligible for spooling. The

Host can also disable spooling for messages through this S2F43/44 transaction. Stream

9 messages are not spooled.

The Host may read spooled messages or purge the Equipment's spool through the

S6F23/24 transaction.

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If the Host does not intend to use the spooling features of the Equipment, the Equipment

Constant ConfigSpool (VID 66) should be set to zero. Setting this EC to zero disables the

spooling feature. If this is not set to zero, and the Host does not support spooling, the

SECS connection with the Equipment will be crippled. This happens because of the

following:

1. When spooling becomes active (transmission error), the Equipment will not send non-

stream 1 primary messages to the Host. That is, it will not send, events, alarms,

process programs, terminal display, etc.

2. When spooling becomes active, the ONLY way to deactivate it is to read or delete the

spool from the Host. In complying with the GEM standard, he Equipment does not

have the ability to reset its spooling state.

3. Therefore, if your Host does not support spooling and spooling becomes active, you

will never again receive non stream 1 messages from the Equipment. If this occurs,

you will need to use a Host simulator such as SECSIM to delete the spool.

If the Host does not intend to use the spooling features of the SIPLACE, CONFIGSPOOL

(VID 1002045) should be set to zero. This will disable the spooling feature and the

Equipment will never transition to Spool Active state. After a transition is made to Spool

Active, the only way to get out of the state is to read or purge the spool.

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Messages are sent to the spool only if the Host has enabled these messages for spooling.

This precondition will not be repeated throughout this section. Assume that the messages

referred to in this section have been enabled for spooling.

While spooling is active, the Host may initiate primary messages and the SIPLACE will

respond, if it is in the COMMUNICAING state.

GEM for SIPLACE V7.01

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When a transmission failure occurs, the first message sent to the spool is the event

message GemSpoolingActivated (CEID 1000007). The next message sent to the spool is

the message which caused the communications failure. The following table depicts the

activity at the SIPLACE when spooling starts.

# Equipment Send

Sequence

Spool Sequence Description

1 S5F1 (Alarm

Report 1)

S6F11 (Spool

Activated Event

Report)

Equipment attempts to send an alarm

report to the Host, but experiences a

transmit failure. The

GemSpoolingActivated event (CEID

1000007) is sent to the spool.

Variable GEMSPOOLSTARTTIME

(VID 1002042) is updated.

2 S5F1 (Alarm

Report 1)

The Alarm Report message is sent to

the spool.

3 S6F11 (Event

Report 1)

S6F11 (Event

Report 1)

The Equipment generates an event

report and it is sent to the spool.

4 S5F1 (Alarm

Report 2)

S5F1 (Alarm

Report 2)

The Equipment generates an alarm

report and it is sent to the spool.

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While spooling messages, the Equipment will increment the SPOOLCOUNTACTUAL

(VID 1002038) and SPOOLCOUNTTOTAL (VID 1002039) status variables for each

message spooled. Messages which require an inquire/grant scenario are spooled along

with the inquire message as a single message. That is, if a multi-block S6F11 (Event

Report) message is being sent to the Host and spooling is active, the S6F5 (inquire) as

well as the S6F1 are sent to the spool and SPOOLCOUNTTOTAL (VID 1002039) and

SPOOLCOUNTACTUAL (VID 1002038) are incremented by one.

The SIPLACE maintains two Equipment Constants which effect the spooling of

messages. The first is CONFIGSPOOL (VID 1002045). If this is set to zero, then

spooling will never become active. If it is set to one, spooling will become active when a

transmission failure occurs.

The EC OVERWRITESPOOL (VID 1002046) determines if the Equipment should over-

write the oldest messages with new ones when the spool becomes full. If

OVERWRITESPOOL is TRUE, old messages will be over-written with new ones. If

FALSE, new messages will be discarded when the spool is full.

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The Host can read spooled messages by sending the S6F23 message. Upon receipt of

this message, the Equipment will reply and attempt to send spooled messages.

Messages are sent in order of oldest to newest, with no priority given to a particular kind

of message. The EC MAXSPOOLTRANSMIT (VID 1002037) determines the maximum

number of spooled messages which are sent per S6F23 message received from the Host.

If zero, all spooled messages are sent, if any other number, that number of messages are

sent.

During the de-spooling of messages, the Equipment maintains only one outstanding

Equipment-Initiated transaction. The equipment will wait for either a reply to the primary

or a T3 timeout before starting another transaction. If the de-spooled message requires a

inquire/grant scenario, the Equipment will initiate this transaction first. If the Host accepts

the inquire, the message is sent. If not, then the Equipment removes the message from

the spool and discards it.