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TimeHub 5500 TL1 Reference Manual

Keywords

097-55501-02 Issue 5: June 2003

SSSSSSSSSSS SSSS S SSSSS SSSSSSS S SSS S SSSSS S

ECLKEXP (Expected Expansion Controller Card)

This keyword provides a method for establishing whether or not an expansion shelf

(or shelves) is expected to be part of the TimeHub system. Since an expansion shelf

cannot function without at least one expansion controller (EC) card,

communication from the master shelf with an EC card in a given expansion shelf is

used as the method for determining whether or not there is a functioning

expansion shelf connected. The keyword format is:

ECLKEXP=<value>

There is automatic behavior associated with this keyword. Whenever

communication with an EC card occurs, the associated ECLKEXP value is

automatically set to Y. The benefit of this is that there is no need to explicitly

establish that connection to a particular expansion shelf is expected. The

underlying assumption is that connection to an EC card would not occur if there

was not intention to actually use the expansion shelf associated with it. Setting

ECLKEXP to N while communication with that EC card is continuing will cause the

ECLKEXP value to be automatically be returned to Y.

If it is desired to remove an expansion shelf from a TimeHub system, the ECLKEXP

settings for EC cards in that shelf should be set to N after the shelf connection has

been removed. This will prevent the EXCLKGONE condition from being reported for

those EC cards.

Command Examples:

Retrieve the current setting of ECLKEXP for expansion shelf 2 (S2-) for the right

side expansion controller card (CLK2).

Note:

For each expansion shelf, the left side EC card (labeled EC1 on the shelf) is

identified by CLK1. The right side EC card (labeled EC2 on the shelf) is identified by

CLK2.

RTRV-EQPT::S2-CLK2:SV01:::PARAMETER=ECLKEXP;

Parameter Value Description

<value> Y Communication with the identified expansion controller card is

expected. If communication with this card is not taking place, an

EXCLKGONE event will be generated (refer to command

example).

N Communication with the identified expansion controller card is

NOT expected.

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