Document Part # 026-4703 Rev 8 10-JUN-2009
Page 18 of 18
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Installation Instructions: Control Link ACC Anti-Condensate Controller System
technical bulletin
Specifications
Troubleshooting Control Link ACCs and the ECT MODBUS Network
Problem: Control Link ACC Offline
1.
Check wiring -
Verify the Control Link ACC is properly connected to the MODBUS cable. Verify the net-
work polarity is correct (+ to +, - to -, 0V to 0V) and there are no loose wires. If none of the Control Link
ACCs are online, check wiring connections on the E2. Check the cable jackets to make sure all network cable
is Belden #8761 or equivalent.
2.
Verify MODBUS Port Setup -
Press
6
+
+
on the E2 front panel. Verify COM2, COM4, or COM6 is set up
as a MODBUS port. If so, verify that the MODBUS cable is connected to the proper connectors (refer to
Fig-
ure 9
on
page 6).
Verify the COM port fields are properly set for ECT MODBUS (19.2k baud, data size=8
bits, Parity=NONE, stop bits=1).
3.
Make sure Control Link ACCs were commissioned -
Press
I
followed by
on the E2 front panel
and verify the offline Control Link module has a non-zero number in its Board# field. If the number in the
Board/Node field is zero, highlight the controller name and select
D
- SET ADDRESS followed by
-
Select Address. Then select the network ID that matches the setting on the network address DIP switch/
jumper.
4.
Check Control Link ACC network card DIP switch/jumper settings -
make sure switches/jumpers 1-6 on
the Control Link ACC network card match the network ID number of the offline Control Link ACC.
5.
Verify switches/jumpers 7 and 8 are in the DOWN position -
Switches/jumpers 7 and 8 in the DOWN posi-
tion specify 19.2k baud and no parity. If either of these switches/jumpers are not in the DOWN position, set
them DOWN.
6.
Check network termination -
The two devices on either end of the MODBUS network should be terminated,
with all other devices in the daisy chain unterminated. Check jumper settings for all devices on the network.
Ambient
-40°C to +65°C
Humidity
5% to 95% non-condensing
Door Sensor
+/- 0.4°C of 0 to 80°C; up to +/- 0.6°C at -40°C and 120°C
Dewpoint Sensor
+/- 1°C over RH of 40 to 95% RH
+/- 4°C over RH of 10 to 40% RH
Input Voltage
102 to 265 VAC
UL Recognized
File E110725
Table 1 - Control Link ACC Specifications
