Owner manual
5
IND100084-11
Introduction
This document denes the electrical interface, serial data format, and communication protocol of the Serial
Communication Control Interface. The purpose of this interface is to enable a computer application to control one or
more units. Units refer to either displays or panel computers.
Serial Interface Conguration
The serial interface can have different congurations, selected by the OSD menu. The congurations are dened as
follows:
RS-232 One computer controls one unit, no individual address
4-wire RS-485/RS-422 One computer controls max 16 units, each with individual address.
2-wire RS-485 One computer controls max 16 units, each with individual address.
Cables
A cable with an overall shield terminated at the back shell should be used.
Electrical Interface
Electrical signals shall conform to RS-485, RS-422 or RS-232. Only Receive Data, Transmit Data, and Signal Ground
are used. The same conditions apply for both 4-wire and 2-wire, and will just be referred to as RS-485 in this document.
Hardware handshake is only supported by loopback handshake for RS-232.
- Display (Maritime Multi Display - MMD) based units with Multifunction Cable (VSD100692 series):
• SCOM RS-232 : 1 x 9P DSUB (female) COM1 RS232
• SCOM RS-422/485 : Multifunction Cable customized/optional on request
- Display (Industrial Standard Display - STD) based units with Multifunction Cable (VSD100692 series):
• SCOM RS-232 : 1 x 9P DSUB (female) COM1 RS232
• SCOM RS-422/485 : Multifunction Cable customized/optional on request
- Panel Computer (Maritime Multi Computer - MMC) based units are by factory default manufactured with:
• COM RS-232 : Internal Virtual COM 3 (No pin-out assignments needed, handled by OS/Driver)
Internal Virtual COM x (VCOM), where x is OS/conguration dependent. This Virtual COM port enables you to
send commands TO the same unit that you are sending FROM, which means there is no need to differentiate
between local control or remote control for communicating through physical ports such as RS-232, RS-485 /
RS-422 towards other units located externally.
Communication Interface
Serial Communication (SCOM) Interface