Pressure Transducer Setup; Rs485 Net Monitoring Temperatures - Emerson xm678d Operation And Installation Manual

9 Pressure
Transducer Setup
In
+12v
Brown
In +5v
gnd
Virtual Pressure: In this example of programming,
the master device is the regulator with the pressure
probe connected.
Slave Master
tPP = LAn tPP = PP
LPP = n LPP = Y
P5C = nP P5C = 420
(transd.)
38 39
19 20 21 22
Pb6 Pb6
Superheat
Superheat
Probe
Probe
Press the arrow keys to access menu readings for
pressure.
Once set up, check these readings:
Slave device Master device
pressure: pressure:
rPP: Shows the dPP = Shows
value of the value of
pressure pressure
received by measured by
remote pressure pressure
probe connected transducer.
to other dP5 = Shows
XM600K the temperature
device. value measured
by probe 5.

RS485 Net Monitoring Temperatures

4 to 20 mA for PP07, PP11,
or similar models
Generic metric ratio
0 to 5V
Slave
Tpp = LAn
LPP = n
P5C = nP
38 39
38 39
Pb6
Pb6
Superheat
Transducer
Probe
4 to 20mA
Slave device
pressure:
rPP: Shows the
value of
pressure
received by
remote pressure
probe connected
to other
XM600K
device.
Check for error messages. Error message examples:
• dPP = Err: in the Master device, the value of
pressure read from the transducer is outside the
acceptable range regarding parameters PA4- PA20;
is connected incorrectly or it is not configured to
parameter P5C.
• PPF = reading on the slave device - LAN
communication is not functional.
• tPP = LAn: in the master controller, LAN address
sequences are not correct. LPP = Y means the
address sequences are not correct.
Final Control From Superheat (SH) Reading Control
Values:
• dPP = Shows the value of pressure measured by
pressure transducer.
• dP6 = Shows the temperature measured by probe 6.
Corresponds to the outlet temperature of gas of the
evaporator.
• SH = Shows the actual superheat value. It must have
a consistent value for difference between the values
dP6 and dP5. If displaying nA, err or nd, the value
is not calculable at the moment of the reading.
9.1. RS485 Net Monitoring
Temperatures
Shielded Serial Cable
Pressure Transducer Setup • 17
1. Terminals -36 and
+37
2. Use Belden cable
#8762 or #8772
3. Keep at a maximum
distance of
approximately 1Km