40 Instruction Manual QuickTOC
®
ultra
IECEx 12E5119
3 Product
3.7 Cooling and Emergency Cooling LAR | PROCESS ANALYSERS AG
3.7.2.2 RS232 Serial Interface
The analyser is fitted with a TRC board which is used to connect to external devices and/or process con-
trol systems. It is in the top left-hand side of the installation plate in the rear part of the housing (Fig. 25,
page 36). The rear part of the housing needs to be opened to access it:
Formats:
• Date;Time: dd.mm.yyyy-hh:mm:ss
• ReadingDisplay: @@@@@@.@@ (six places before and two after the decimal point; places
not used are filled with zeroes)
• Status (examples): "Errors = (E1835_E1836)" ; "Limits = (L1_max LV1_max)" ; "Status = (M1)"
(the underline stands for space)
Different activities are listed in the status string. The maximum length of the string sent is 4095 charac-
ters.
3.7.2.3 Digital input
The analyser can be monitored and controlled via the digital inputs. This option enables for example only
one measurement to be started when there is a sample. The input signals (0 - 24 V DC) necessary must
be provided by the user:
Table 3: Serial interface parameters
Baud rate 9600Bd
Parity no
Data bits 8
Stop bits 1
Protocol Xon / Xoff
Example:
When you send letter „D“, the analyser responds by sending the current data in the following format:
Date;Time;ReadingDisplay1;ReadingDisplay2;...Last ReadingDisplay;Respective status
Table 4: Digital inputs with DC voltage applied
Digital Input 1, 2, 4, 5, 6, 7 (Measurement of Sample)
0 - 3 V Analyser waits
12 - 24 V Measurement
Digital Input 3 (General Stop of the Analyser)
0 - 3 V No Changes
12 - 24 V Measurement is stopped
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