Future Design LIMIT L91 User Manual

37
200
190
200
190
200 200 200
190 190 190
ON
OFF
Figure 3.3
Normal Process Alarm
Figure 3.3
Normal
Process Alarm
Process proceedsProcess proceeds
200
190
200
190
200
200
200
190
190
190
ON
Figure 3.4
Latching Process Alarm
Figure 3.4
Latching
Process Alarm
SP2 = 200 AL.HY = 10.0
AL.MD = LTCH AL.FN = PV.H.A
SP2 = 200 AL.HY = 10.0
AL.MD
= LTCH AL.FN = PV.H.A
Process proceedsProcess proceeds
3-7 RS-485 Communication3-7 RS-485 Communication
Using a PC for data communication is the most economic way.
The signal is transmitted and received through the PC
communication Port (generally RS-232). Since a standard PC can't
support RS-485 port, a network adaptor (such as SNA10A, SNA10B)
has to be used to convert RS-485 to RS-232 for a PC if RS-485 is
required for the data communication. Many RS-485 units (up to
247 units) can be connected to one RS-232, that is a PC with 4
comm ports can communicate with 988 units.
Examples:
UM L91-Rev 8

Future Design LIMIT L91 Specifications

General

Brand	Future Design
Model	LIMIT L91
Category	Controller
Language	English