Paperless recorder takes Modbus onboard
An
Audon Electronics product story
Edited by the Engineeringtalk editorial team
Dec 1, 2003
The VR18 is a panel-mounting 6in LCD colour chart recorder with alarms, maths functions and Modbus based serial communications.
The VR18 is a panel-mounting 6in LCD colour chart recorder with alarms, maths functions and Modbus based serial communications.
Up to six I/O cards can be fitted in the rear of the unit consisting of isolated analogue input, digital input and relay output.
Virtually any sensor can be connected to the analogue inputs including thermocouples, PRT, mV, V, 4-20mA etc.
The VR18 stores data to a 16Mbyte CompactFlash memory card (supplied with the VR18) at preset rates - 1, 2, 5, 10, 30, 60 or 120s.
Other sizes of CF memory card can be fitted, up to 128Mbyte.
The VR18 can also display channel data in real time in various formats on up to six different pages.
This can be scrolling charts, bar charts, numeric display, or a combination of all in "mixed mode".
Recorded data can also be recalled and displayed in "history" mode.
Each analogue input can be programmed with two sets of high/low/deviation alarms, and two separate events can be instigated on alarm.
This could be setting a relay output or generating a report.
The VR18 also supports virtual channels, whereby a channel can be derived from several others using a maths function.
The digital inputs can also generate alarms or events.
Alarms can be display and acknowledged on the alarm list page.
The VR18 also has up to six counter/timer/totalise functions.
Timer/counter functions can be used to generate reports at specific times on a daily, weekly or monthly basis.
The totaliser is useful for compiling data for inclusion into reports.
The VR18 comes with an Ethernet port as standard and can be fitted with an RS232/485 port as an optional extra.
The VR18 supports Modbus RTU, and can easily integrate with any existing Scada package.
The VR18 also comes with the Observer software package that allows configuration, monitoring and data downloading.
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