this case the alarm can be activated even if the display value is less than the alarm setting, this is
because the alarm is activated by the value in peak memory rather than the display value.
Example 6
-
A1
is set to
Lo
and
R.INP
is set to
Lo
If
A1Lo
is set to
280
and the valley memory value becomes less than
280
then alarm 1 will be
constantly activated at this point and will only become de activated when the memory is reset at a value
above
280
. The memory can be reset by holding the remote input closed for 2-3 seconds. Note that in
this case the alarm can be activated even if the display value is greater than the alarm setting, this is
because the alarm is activated by the value in valley memory rather than the display value.
Example 7
-
AI
is set to
dISP
With the alarm function set to follow the display value the alarm relay will activate whenever the display
shows an alarm condition, irrespective of any alteration to the original scaling values due to a tare,
zero, peak memory etc. operation. Thus if
A1Lo
is set to
50
and
A1Hi
is set to
100
then alarm relay
1 will activate whenever the value shown on the display falls below
50
or goes above
100
. If the
R.INP
function is now set to
Hi
(peak memory) and the peak memory value is
100
or greater then the
alarm relay will be activated whenever the remote input is used to display the
Hi
value, irrespective of
the live input at the time.
A2, A3
&
A4
(alarm 2, 3 & 4 operation mode)
Operates as per
A1
above but affects alarm relays 2, 3 & 4.
REC
(analog retransmission output mode)
- seen only when analog retransmission option is fitted
The analog retransmission mode function allows the selected retransmission output to follow either
the live input value (
LiuE
), the tare function (
tARE
), the peak hold function (
P.HLd
), the display hold
(
d.HLd
), the peak memory (
Hi
) or valley memory (
Lo
) or the display value (
dISP
). For settings other than
dISP
operation a remote input or
P
button must also be set to the function required. These settings affect
the retransmission output in the same manner as the equivalent settings affect the alarm relay operation -
see
A1
function for details.
bAud
(Set baud rate)
- seen only with serial output option.
Select from
300, 600, 1200, 2400, 4800, 9600, 19.2
or
38.4
baud.
Prty
(Set parity)
- seen only with serial output option.
Select parity check to either
NONE
,
EUEN
or
odd
.
O.Put
(Set serial interface mode)
- seen only with serial output option. Refer to “Optional Outputs”
appendix in this manual for a full description of the
diSP, Cont, POLL
and
M.buS
modes.
Allows user to select the serial interface operation as follows:-
disP
Sends image data from the display without conversion to ASCII.
Cont
Sends ASCII form of display data every time display is updated.
POLL
Controlled by computer or PLC as host. Host sends command via RS232/485 and instrument
responds as requested.
Addr
(Set unit address for polled (POLL) mode (0 to 31))
- seen only with serial output option.
Allows several units to operate on the same RS485 interface reporting on different areas etc. The
host computer or PLC may poll each unit in turn supplying the appropriate address.
The unit address ranges from 0 to 31 (DEC) but is offset by 32 (DEC) to avoid clashing with ASCII
special function characters (such as <STX> and <CR>). Therefore 32 (DEC) or 20 (HEX) is address 0, 42
(DEC) or 2A (HEX) addresses unit 10.
SERL
(Serial retransmission mode)
- seen only with serial output option - applies only when
O.Put
function set to
Cont
.
Refer to
REC
function on for function description. The
HiLo
selection in this functions allows both
the peak and valley memories to be transmitted. The peak value will be transmitted followed by a space then
the valley value.
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