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PRESYS
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Instruments
3.2.1 - Level 1 - General
In level 1 we have the options: TAG, SOFT, PASS, INDIC, SP.Li, PO.BR, ST.CO,
LED1 and LED2 (see figure 13).
TAG - this option enables a numerical identification for the instrument. The
procedure to enter a tag or any other parameter is the same as for the previously
described password, (see the functions of ENTER, UP and DOWN keys under password
by value):
SOFT - shows the number of the software version.
PASS - an option used for entering a password system giving access to the
configuration mode. The password system may be entered by key, by value (a number
selected by the user or the number 2057) or both. As previously explained, the sequence
for entering a password by key is to press the UP, DOWN and ENTER keys, in that
order.
INDIC - Within the option for the indication of controlled variable values (upper
display) and the setpoint/output (lower display), there is the possibility of having a display
of the values associated with the control loop 1 (C - 1) and the control loop 2 (C-2) either
on the user initiative, by pressing the UP, DOWN and ENTER keys, or leaving to the
instrument itself to alternate between the corresponding values of each loop. In the first
instance, NO should be selected for option TWO, and in the second instance, YES
(automatic scanning mode) is selected for option TWO, together with the display time, in
seconds, assigned to each loop.
SP.Li - this is the option which limits the user selected setpoint between the
minimum setpoint value (SP1L, SP2L) and the maximum setpoint value (SP1H, SP2H).
Those four parameters are user configurable.
PO.BR - expressed as a percentage of the output value, it determines the output
level in the event of temperature sensors (thermocouple and RTD) and linear sensors
(55mV, 5V) being damaged. Refer also to option B.OUT, at the input configuration
levels. In the case of linear sensors, the occurrence of a signal lower than (the display
indicates UNDER) or in excess of (the display indicates OVER) about 10% of the input
span forces the output to switch to the manual mode in a PO.BR configured level.
ST.CO - this option allows the selection of the mode in which the Controllers
should reset after a power failure. If the mnemonic LAST is selected for option ST.CO,
the Controller will reset to the same configuration it was operating prior to the power
failure (manual or automatic). Whenever the MANL option is selected for the ST.CO
option, the Controller will always reset to the manual mode after a power failure, with the
output level being determined by the MANL parameter. The MANL parameter is user
adjustable.
DCY - 2057 Pressure Controller
Operation
Page 24
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