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Apparatus control
Besides from the three operator places, commands can also come from automatic func-
tions. These inputs are handled in the same way as the normal operator place signals.
For sequence switching, the apparatus can be reserved with the SEL_SEQ input.
For command supervision, COMCON has two time parameters. The supervision
checks the time between select and execute signals and checks the response on a request
for selection including reservation of other bays. When any of them is incorrect, COM-
CON indicates this with the LO_OP_T and RES_ERR outputs. Also, the CANCEL out-
put gives a signal (pulse) to reset the selected command in SWICON.
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Maximum time between a select and the execute command coming from the operator.
Also the maximum time between the request to override and the following select.
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Allowed time (for BAYCON) to make the reservation.
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SWICON handles basically two functions, indication and supervision of operation. The
indication inputs can either be individual per phase including the pole discordance
check (SWICONA and SWICONB) or common for all three phases (SWICONC). The
indication part checks the position indication information and gives indications (OX,
CX) on the results. The POSIND_V input is used at external evaluations of the positions
or at printed circuit board error. POSIND_V = True means valid positions. The result
of (OX, CX) is (0, 0) (for intermediate position or when POSIND_V = False). It also
includes the function for manual position updating. The position indication can be set
manually, and the updating from the process is stopped. Manual updating is indicated
by MA_UPD_P.
The indication part has two timer parameters. The POS_ERR is activated momentary
at the intermediate position (1, 1) but is delayed the T_POSERR time at the position (0,
0). The POL_DISC output is activated when a pole discordance is detected and the
T_POL timer expires.
SWICON has inputs and outputs for selection and execution. In case the SWICON as-
sumes the select-open or -close-before-execute principle (that is, either OPEN or
CLOSE is set), the SELx (SELECT) signal from BAYCON energizes the selection out-
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