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Industrial hardware of the firm Advantech PCA-6753, PPC-L126 |
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In the project Data acquisition system of boiler №1 CHP to hands we get panel PC PPC-L126 and industrial PC on chassis IPC-6608 with processor board PCA-6753.
The industrial PC "PCA-6753" has next specification:
| Central processor: | Low-consumption NS GXm-200 MHz (fanless) |
| Operational memory: | 64 МБ DIMM SDRAM |
| Permanent memory: | SSD DiskOnChip® 2000, IDE (40 pin, UDMA 33, 256МБ IDE Flash) |
| Video subsystem: | CX5530 VGA/LCD and 18-bit LCD TFT |
| Audio subsystem: | no |
| Interfaces/ports: | 10/100Mbps Ethernet (RTL-8139); RS-232 + RS-232/422/485 serial ports; 2 x USB 1.1 (host), IR port; LPT; Floppy |
| Power supply: | +5VDC ±10% @ 1.54A |
| Operating conditions: | 0 ... 60°C |
The controller is some old and has a low-performance for modern programs but for the tasks of execution environments of PLC it is suitable enough and on it was successfully downloaded firmware based on ALTLinux 5.1 packages base. At that about a real-time no a speech was by the high-precision timer (HPET) lack.
The panel PC "PPC-L126" has next specification:
| Central processor: | VIA Eden 667 MHz |
| Operational memory: | Two 168-pin DIMM sockets (128 MB) |
| Permanent memory: | CompactFlash type I/II, IDE (44 pin, UDMA 33/66/100, 10 GB) |
| Video subsystem: | VIA Savage4 2D/3D/Video, sensor display 12.1", frontal panel: IP65/NEMA4 |
| Audio subsystem: | AC97 Ver. 2.0 |
| Interfaces/ports: | 10/100Mbps Ethernet (RTL-8139); 3 x RS-232 + RS-232/422/485 serial ports; 2 x USB 1.1 (host); PS/2 keyboard and mouse; LPT |
| Power supply: | 19VDC @ 3.3A |
| Operating conditions: | 0 ... 40°C |
The panel PC also has small resources for start modern environment then for installing on it was using the distribution "ALTLinux T6" with the actions to optimization:
- storage drive performance — for the data storage used the IDE hard-drive which ensure 10 MB/s, more then allowed CompactFlash;
- all spare services disable;
- the desktop environment TDE usage as lesser demanded to resources but more advanced; into the reserve has IceWM;
- building OpenSCADA without libraries Phonon and WebKit which too demanded to resources.
These actions allow fit the system to 128 MB of operational memory and get at that an advanced and productivity graphical environment. For the sensor display ELO configuration had using the driver "elographics" — "xorg-drv-elographics". To the configuration file "xorg.conf" added section:
Section "InputDevice"
Identifier "ELO touchscreen"
Driver "elographics"
Option "Device" "/dev/ttyS3"
Option "MinX" "300"
Option "MaxX" "3800"
Option "MinY" "3800"
Option "MaxY" "300"
Option "UntouchDelay" "10"
Option "ReportDelay" "10"
Option "SendCoreEvents" "yes"
Option "ScreenNumber" "0"
Option "ButtonNumber" "1"
EndSection