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Specific
digital panel meters which only
occupies two PLC output ports
(Two-wire Digital Meters for PLC) |
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A function of
control Product-HLP2C |
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Introduce for
Company |
A introduction to the company
BrainGK industrial control institute is a powful technology company which covers product design, manufacture and providing service in this field. Our company is technologically powerful in term of programmable logic control and our product is mainly used in the all kinds of mechanical appliances. The HLP2 series digital panel
meters are widly used by many companies on their mechanical applicances. We produce this product strictly according to the industrial standard and HLP2 has the feature of high transmission speed, good liablity and low price.
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Photos of products |
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There are four wires coming out from the digital panel
meters, two of which are electronic power supply of 24V while the other two of which are clockwire and datawire. Please click for concrete information.
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interface data standard |
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multi-meters connection |
| N HLP2
meters can be connected to one PLC seizing only N+1 PLC output ports. While the refresh frequency does not lower.
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Programming skills of PLC digital panel
meters |
Take OMRON PLC as an example to illustrate the method, other PLC can refer to this method.
there are five parts in the process of the programming.
1: generate clock pulse. "KEEP" is used to generate pulse according to the period of scanning in OMRON. Some PLC do not need such process, while they use the particular clock pulse generated by
PLC.
2:send the data which need displaying to the data buffer and reset the control buffer. For example "MOV #1234" sends constant #1234 to the buffer 211. If you want to display a variable, you can send a particular buffer to buffer 211, and send the data to the particular buffer will make it.
3: "SFT" can move the data in four buffers from 209 to 212 one bit left and fill the vacancy at right wiht "1". It doesnot need resetting.
4: "SDA" is data output which satisfies the output of "sink" transistor, when it comes to the
" source" transistor, it needs to revert.
5: "SCK" is the output of clock pulse which satisfies the "sink"
transistor, when it comes to the " source" transistor, it needs to revert.
Only process 3 is needed to repeat to deal with the situation of
bi-meters or multi-meters.
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Feature:
The solution to display PLC data at a low cost
Occupying(siezing) only two PLC output ports, save the cost of
hardware (2 wire Panel Meter solution).
Easy PLC drive program, making your design fluency.
Only N+1 output ports are needed when N meters are connected.
High refresh frequency, multi-meter connection does not lower the
frequency.
PLC output ports can be extensified, the extensive ports are
programmable
Display with high luminance. You can read from every angle, without
worrying about its disappearance without illumination.
We can make meter of particular dimension for user's specific
application.
HLP2
style can receive all data from PLC through only two PLC output ports.
Any appointed data in PLC program for example the counter, the timer,
data register etc will appear on the meter after the data are sent to
the appointed buffer.
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Information of HLP2 series Digital
Panel Meters
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HLP2
series Digital Panel Meters User's Manual (PDF file) HLP2
series Digital Panel Meter User's Manual (Word file)
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A
Example and Program method on PLC of Digital panel Meters drives
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Drives
for SIMATIC S7-200
PLC
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Drivers
for OMRON PLC
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Drivers for
MITSUBISHI PLC
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Drivers for
LG PLC
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Drivers
for NAiS PLC
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