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Apparatus control
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For reservation of other bays, signal exchange between the bays is necessary. The sig-
nals to reserve other bays and signals to reserve the own bay from other bays are shown
in figure 95, which describes the receiving part of the reservation function. Multiple
Command Function blocks are used to receive the information from other bays (see
document "Command function").
The module BAYCON requests the reservation of other bays with RE_BAYS and
needs to know if other bays are reserved or not. It receives the acknowledgements on
the ACK_F_B inputs, which specifies that all bays are reserved and on ANY_ACK that
any bay is reserved. It also checks the communication status (V_TX).
The logic to gather these signals from the requested number of bays (in this example
from three bays X, Y, Z) is delivery specific and made outside the BAYCON module.
This is because the BAYCON is independent of the number of bays to communicate
with.
When the request is coming from another bay, there is one signal (RE_RQ_B) for res-
ervation request. V_RE_RQ is the signal for valid request from any bay.
The EX_DA_UP input signal indicates that the program that acknowledges the reser-
vation is running. This signal is not applicable in this application and can be set to
1=FIXD-ON.
With the inputs RE_Bx (x = 1,...8) set to 1= FIXD-ON, it is possible to suppress the
reservation of other bays at a request select (RQ_SEL) from a specific apparatus (1,...8)
in the own bay. That is, the BAYCON only reserves the own bay.
The signal BLK_RE blocks the reservation. That is, no reservation can be made from
the own bay or any other bay. This can be set via a binary input from an external device
to prevent operations from another operator place at the same time. This function can
be overridden in the own bay with the OVERRIDE signal, for example, from the HMI.
212
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