S+S Regeltechnik Premasgard 814 Modbus Série Notice D'instruction page 17

G
®
PREMASGARD
Schematic diagram
Plug for
display
B
4
A
3
GND
2
U+
1
shield
DIP A: Bus address
DIP B: Bus parameters
(Baud rate, parity...)
Manual zero point calibration (Pa):
Telegram indicator
1. The device must be operative for at least 60 minutes before zero point
Reception (LED green)
Error (LED red)
setting is started.
2. Connect pressure inputs P (+) and P (–) with a hose
(differential pressure between the connections = 0 Pa).
3. To set the zero point, press the "auto zero" pushbutton for 10 seconds
without interruption.
By pressing the pushbutton, a countdown of approx. 10 seconds is started.
The yellow LED is blinking and the countdown is shown on the display
(optional).
After the countdown period has elapsed, zero point calibration takes place.
This is indicated by continuous LED light and at the display (optional)
by switching from "AUTO 0" to "PROG 0".
Note: When releasing the pushbutton during countdown
(counter > 0), zero point setting is immediately aborted!
Automatic zero point calibration (Pa):
A zero point calibration is carried out cyclically via an internal valve.
The cycle time can be set between 15 minutes and 24 hours using
the Register 4x0025.
During the automatic calibration, the output value remains at its last
pressure value.
814x - Modbus
Plug for
display
4
mode B
3
ON
2
1 2 3 4 5 6
1
auto zero
B
mode A
A
DIP B ON DIP A
GND
1 2 3 4 5 6 7 8
U+
offset
shield
Pa r.H. °C
DIP A: Bus address
B
8
DIP B: Bus parameters
A
7
(Baud rate, parity...)
GND
6
Telegram indicator
U+
5
Reception (LED green)
shield
Error (LED red)
LED (internal status)
Reset button
Manual setting of the offset (Pa ⁄ r.H. ⁄ °C):
Offset correction
The sensors are pre-set and calibrated at the factory.
Shielding
Each measuring channel has a separate offset potentiometer
for subsequent adjustment of the measurement.
The adjusting range is ± 10 % of the measuring range (humidity /
pressure) and ± approx. 5 K (temperature).
17
auto zero
mode B mode A
B
4
ON DIP B ON
A
3
PREMASGARD
1 2 3 4 5 6 1 2 3 4 5 6 7 8
GND
2
U+ offset
1
shield
Pa
B
DIP A: Bus address
A
DIP B: Bus parameters
GND
(Baud rate, parity...)
U+
Telegram indicator
shield
Reception (LED green)
Error (LED red)
LED (internal status)
Reset button
Offset correction
Shielding
Rev. 2021 - V13
DIP A
® 814x - Modbus
r.H. °C
8
LE
7
Re
6
5
Of
Sh