Access Code; Serial Communication - Fini RD 185-810 User Manual

40069 Zola Predosa (BO) - ITALY
5.17.5 REMOTE ALARM SIGNAL
A voltage free contact is provided for remote signalling the sum of any alarm condition of the dryer.

5.17.6 ACCESS CODE

A serviceman's code is required to access level 2.
The manufacturer accepts no responsibility for damages due to the alteration of the operating
parameters.
The password is specified in the last page of this manual.
The password must be kept by qualified personnel.

5.17.7 SERIAL COMMUNICATION

The DMC20 features an RS485 serial port (see terminal A and B on DMC20 back side) allowing the
connection to a network managed by a PC or PLC controller.
A maximum of 255 DMC20 units can be connected to the same network.
If a PC is used, the connection between the PC and the DMC20 network requires usage of an SBC485
interface adaptor (can be purchased as accessory - see spare parts list) to convert the RS232 (PC) signal
into an RS485 (DMS20) signal. The RS485 line is made of a two wire cable and can be up to max. 2000
meters long; for long distance (exceeding 100m), it is advisable to use a shielded twisted pair polyethylene
cable.
For good data transmission, it is imperative that at the cable end of the RS485 line a 120 ohm ¼ watt
resistor is placed, as shown in figure.
A
120
B
K
set
PERIPHERAL No. 255
CONNECTIONS
PROTOCOL
The data flow between PC and SBC485 is controlled by an RTS signal. The protocol used for
communication is a subset of MODICON MODBUS 1 (MB1); functions 03 and 06 only are supported. Data
are exchanged in ASCII mode with the following format:
Baudrate : 9600
E S
COM # PC
25 pin RS232
Shield - pin 1
Tx - pin 2
Rx - pin 3
RTS - pin 4
CTS - pin 5
GND - pin 7
Data bit : 7
info@finicompressors.it
RS 232
A
B
K
E S
se t
PERIPHERAL No. 2
SBC485
25 pin RS232
n.c.
pin 2
pin 3
pin 4
pin 5
pin 7
Stop bit : 1
SBC 485
A
B
K
E S
set
PERIPHERAL No. 1
SBC485
9 pin RS485 DATA connector
A - pin 1 A Terminal
B - pin 2 B Terminal
Shield - pin 4
Parity : even
- EN -
RS 485
DMC20
n.c.