Simex SRT-77, Руководство пользователя

Страница: 19 / 40

User manual - METER SRT-77-XA
Figure 6.5 presents the principle of relay outputs operation for two thresholds mode, and an
example values of other parameters. In this mode parameter
“SEt2” is accessible in common
with “SEtP” , this parameter describes a second threshold of the relay output. The parameters
“HYSt” , “modE” , “t on” , “toFF” , “unit” and “AL” are connected with both “SEtP” and
“SEt2”
thresholds. While the controlling process, the relay output changes his state depends
of both
“SEtP”
and
“SEt2”
thresholds in similar way as it was described in one threshold
mode.
If two threshold mode is used, “modE” parameter defines state of the relay output when
the input value occurs in a particular zone defined by border values of both thresholds . The
relay can be turned on if the input value is contained in zone A ( “modE” = ”in” ) or zone B
(
“modE”
=
”out”
) and turned off if it is contained in the second one (Figure 6.5).
The sequence of thresholds “SEtP” and “SEt2” can be set in any order, due to the
control of relay outputs is done depend on difference between thresholds values
(
zone A
) and outside of threshold values (
zone B
).
7. DEVICE PROGRAMMING
The device menu allow user to set all parameters connected to operation of
measurement input, control modes, critical situations behaviour, communication via RS-485
and access settings. The meaning of the particular parameters is described in paragraph
MENU DESCRIPTION .
Some of the parameters can be accessed without menu entering (quick view mode).
If the measurement result is in the allowed range , second display is dimmed or shows one of
the relay thresholds (selected threshold is signalized by LEDs marked
S1
and
S2
). To select
other threshold use [^] and [v] buttons. If a free access is enabled (parameter ”AccE” = on),
user can change the value of particular threshold pressing [ENTER] button (see:
PARAMETERS EDITION
).
7.1. PROGRAMMING MENU
To enter main menu (being in the measurement mode) operator must to press and hold
at least 2 sec. [ESC/MENU] button.
If the user password is defined (see parameter “Scod“ , menu ”SECU” ), operator have
to enter correct one before proceeding to menu options . Entering of the passwords is similar
to the edition of numeric parameters
(see:
PARAMETERS EDITION
)
,
however presently editing
digit is showed only on the display, other digits are replaced by “-” sign.
After entering of last digit of the password first menu position will be displayed (if the password
is correct) or warning ”
Err ” in other case.
Pay attention when device parameters are being changed. If it is possible, turn off
controlled installation (machine).
19
i
!