Carel compactSteam - RS485 Supervisor Card (Standard for P;Ns CH%04 N2003)

20
ENG
“compactsteam” +0300092IE - rel. 1.2 - 14.01.2021
3.12 RS485 supervisor card (standard for
P/Ns CH%04N2003)
Fig. 3.ab
Description of connections on the RS485 card
Fig. 3.ac
The RS485 card is used for communication with a supervisor using the
ModBus protocol. For the list of variables, see the table below.
Caution:
• for model CH004N0003, the CHK4850000 accessory is required
• for RS485 connections in household (IEC EN 55014-1) and residential
(IEC EN 61000-6-3) environments, use shielded cable (with shield
connected to PE both on the terminal and controller ends), maximum
length specied by the EIA RS485 protocol, equivalent to European
standard CCITT V11, using AWG26 twisted pair cable; the input
impedance of the 485 stage is 1/8 unit-load (96 kOhms).
3.12.1 Parameter table
DESCRIPTION TYPE R/W CAREL
ADD
MODBUS
ADD
DEFAULT MIN MAX UNIT VOLATILE
Humidier ready (no alarms) DIGITAL R 11 11 0 0 1 -
Anti-foam wash DIGITAL R 12 12 0 0 1 -
Flag indicating the rst 50 operating hours DIGITAL R 26 26 - 0 1 -
Unit disabled via remote (display shows -) DIGITAL R/W 28 28 0 0 1 YES
0 = humidistat - 1 = 0-10 V controller (set to 0 if control via super-
visor and set the % of production using parameter PO)
INTEGER R/W 12 268 0 0 1 NO
Maximum production (PO) INTEGER R/W 13 269 100 20 100 % NO
Proportional hour counter INTEGER R 14 270 - 0 - hour -
Real hour counter INTEGER R 19 275 - 0 - hour -
Days of inactivity before wash INTEGER R/W 50 306 3 0 10 NO
Select protocol
0=CAREL
1-24 = MODBUS (see table of Modbus values)
INTEGER R/W 52 308 0 0 24 NO (unit power o
neededf)
Alarm identication (see table) INTEGER R 83 339 0 0 65535 -
Display current input ANALOGUE R 16 16 - 0 14.5 A -
Production in kg/h ANALOGUE R 17 17 - 0 4.5 kg/h -
Tab. 3.j
3.12.2 Alarm table
(16-bit multi-bit variable number 83 Carel, 339 Modbus)
BIT NUMBER DESCRIPTION ALARM CODE
1 MAINTENANCE WARNING
(rated current not reached)
E6
2 DRAIN ALARM E5
3 FILL ALARM E4
4 MAINTENANCE WARNING (perc. hour counter >
600)
E6
5 HIGH CURRENT ALARM E1
6 PARAMETERS NOT DOWNLOADED ALARM E0
7 NOT USED
8 LOW PRODUCTION WARNING E2
9 FOAM WARNING E7
10 END OF CYLINDER LIFE ALARM E8
11 NOT USED
12 NOT USED
13 NO VOLTAGE-CURRENT CONFIGURATION
WARNING
EH
Tab. 3.k
3.12.3 Modbus table
To avoid malfunctions, disable any hardware ow control on the
supervisor application level
TABLE OF MODBUS VALUES (C7) TYPE BAUD RATE
0 CAREL 19200
1 MODBUS 8,N,2 19200
2 MODBUS 8,N,1 19200
13 8,N,2 9600
14 8,N,1 9600
Tab. 3.l