Stulz C7000 - Driver module for electronic expansion valve EVD

177
{
{
© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS fOR a/C UNITS
10.5 Driver module for electronic expansion valve EVD
Driver module for one valve Driver module for the control of two valves
LEDs:
On: communication to IOC
alright.
flashing: communication inter-
fered e.g. by wrong transmis-
sion speed
Off: no communication on the
databus
Driver is energized.
Valve 1/2 is being opened.
LED flashes.
Valve 1/2 is being closed.
LED flashes.
Alarm 1/2 is active.
Network connection to port 3 of EBUS board
The following parameters are pre-set for the serial RS485
connection and cannot be changed.
The following parameters can be modified:
Network address (pre-set 198)
Command for C7000: eev 1 id 198
Communcation rate
(pre-set 2=19200 bit/s)
This parameter must be set to 1=9600 bit/s at the
start-up.
For this, remove the user interface with the 5 (twin: 8)
LEDs and replace it by the user interface with the display.
Then carry out the following steps:
1. press PRG key
2. enter password 0066
3. select "Advanced"
4. scroll down until page 4/4
5. set "Network settings" to 1
Parameter Value
Protocol Modbus
Data bits 8 bit
Stopbits 2
Parity none
Transmission modality RTU
Terminal Description
G, G0 Power supply 24 VAC
1, 2, 3, 4 A Stepper motor control, valve 1
1, 2, 3, 4 B Stepper motor control, valve 2
COM A, NO A Alarm relay, circuit 1 (not used)
COM B, NO B Alarm relay, circuit 2 (not used)
GND Earth for sensor signals
VREF active sensors supply
S1 Sensor 1, suction gas pressure circuit 1
S2 Sensor 2, suction gas temperature circuit 1
S3 Sensor 3, suction gas pressure circuit 2
S4 Sensor 4, suction gas temperature circuit 2
DI1 Enabling the control of circuit 1 (not used)
DI2 Enabling the control of circuit 2 (not used)
GND - Network
LAN connection (Modbus) to port 3 of the EBUS
board for RS485 bus
+ Network
– Network