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6.2.1. Jumper
Jumper (placed nearby keys) is accessible after demounting of four screws in the corners of the
box and removing the lid. If communication protocol compatible with standard Advantech-ADAM
is selected, its function is the following:
If jumper during switching ON the power is closed, device always communicates with
following parameters regardless stored setting in the device:
communication speed 9600 Bd, without check sum, device address 00h
If jumper during switching ON the power is not closed, device communicates in accordance
with stored setting.
If jumper is closed during device operation, device temporarily changes its address to 00h, it
will communicate in the same communication speed as before closing jumper and will
communicate without check sum. After jumper is opened setting of address and check sum is
reset in accordance with values stored in the device.
Communication speed and check sum are possible to change only if jumper is closed.
Jumper closed and button pressed for longer than six seconds – causes restoring of
manufacturer setting
of communication protocol
, i.e. sets Modbus RTU communication
protocol, device address sets to 01h and communication speed to 9600Bd (after button press
there is “dEF” message blinking at LCD display. Six seconds later message “dEF” stays
shown, it means manufacturer setting
of communication protocol
is done).
For communication with device which measure more than one value, there is necessary to add at
the end of command, number of communication channel, where the measured value is mapped.
Command for value reading is
#AAx(CRC) CR
, where
AA
is device address and
x
is number of
communication channel by next table:
Measured value
Number of communication channel
temperature
0
relative humidity
1
computed value
2
barometric pressure
3
status word (described below)*
4
Relay1 status [0/1]
5
Relay2 status [0/1]
6
binary input 1 status [0/1]
7
binary input 2 status [0/1]
8
binary input 3 status [0/1]
9
* Status word: 16b value return, bite description:
Bit0 0/1
jumper open/closed
Bit1 -
unused
Bit2 0
always 0
Bit3 0/1
Relay1 open/closed
Bit4 0/1
Relay2 open/closed
Bit5 0/1
internal acoustic alarm status
Bit6 0/1
binary input 1 status
Bit7 0/1
binary input 1 status
Bit8 0/1
binary input 1 status
Bit9 to 15
unused
