Text version of the page

MELSEC Process Control

MELSEC Process Control Catalog - 7025 Process control FBD software package features and specifications

• PX Developer

Features

1

Sufficient FB (function blocks)and functions for loop control

5

Easy program standardization and reusability

PX Developer complies with the IEC61131-3 Standards. The programs can be hierachically arranged as components (User's original FB can be created.) It is easily available to standardize and reuse them. In addition to the process CPU's loop control instruction function blocks, the PX Developer has combined function blocks that are easy to use. Basic FB/functions (logical operation, arithmetic operation, etc.) that comply with IEC61131-3 are also provided allowing simple sequence control to be described in the FBD.

6

Program event execution

2

Easy programming with FB, programming with process tag names

Programs created with FBD are executed periodically, and it can also respond to events, (The event conditions can be described without a program.) PX Developer easily realizes the starting process for nonstationary, error and exceptional processes. The loop control program can be created easily by selecting the required FB from the PX Developer's standard loop control FB or compensation FB, pasting and connecting these on the FB screens, and then setting the parameters such as the PID constants or high/low limits (items configuring tags). When programming with tag names, the parameters in the tag are described as "tag name.parameter name" (FIC001.PV, etc.). The user does not need to be aware of the device memory addresses using these methods.

7

Easily working with digital control/sequence control

Same as programming toolPC/AT compatible personal computer running Windows NT4.0 or 2000. Display resolution 800 x 600 or higher.• Number of process CPU modules under monitor: Maximum 8 CPU modules (up to eight process CPU modules under monitor from one personal computer.) • Number of monitor tags : Maximum 3,840Specifications ItemA faceplate modeling on process regulator is displayed to monitor and adjust (change the operation mode, SV/MV values, etc.) the loop control tags and digital tags. The pop-up tuning screen can be opened from this screen. • 8 faceplates/screen (one group) x maximum 500 screens = 4,000 face plates • In addition to the normal monitor (automatic, manual, cascade), monitoring and operations are available for the override mode and simulation mode. The override mode functions is suitable for keeping the operation when a sensor fails or a wire break to put desired value into PV. In the simulation mode, the MV values are forcibly returned to PV values so the loop operation can be confirmed, etc. • Tagging available for faceplate units. Target CPU and networkTarget personal computerControl panel

1) Process digital control FBsPopular digital control processes, such as motor reversible/irreversible, ON/OFF motorized valve control, etc., are provided as a standard as FBs, so ladder program is not created.2) Easy data exchange with ladder programsPrograms created with FBD share data with the ladder program (created with GX Developer) using logical names (labels) instead of device memory addresses. The ladder program can easily change constants of loop control, SV values, etc.

Monitor tools

3

Analog/digital I/O FB

FBs for executing I/O processes to the analog module and I/O module used by the process CPU are provided. Ladder programms to operate I/O are no longer required.

Number of monitor CPUmodules and tags • Timer execution type ··· High speed (200ms cycle), normal speed (200/400/600/800ms/1sec cycle),low speed (1/2/4/5/10sec cycle), scan execution• Interrupt execution type ... Set cycle interrupt (1 to 999ms), random interrupt (interrupt with interrupt pointers I0 to I255)(In practical use, 10ms and higher/control loop)• Project creation (1 project/process CPU)• Project parameter setting, tag registration, I/O module registration, global variable registration (maximum 32,000)• GX Developer label assignment • FBD program creation and editing (FBD program, user defined FB, user defined tag FB, structure creation and editing) • Program execution setting • GX Developer project startup• Compile, download, online change (Note 1)• Online monitor (online monitor, and change of various variables including tags, tag face plate display, etc.) • Debugging, diagnostics (Start/resume in FB units, display of error code and corresponding FB name when fault occurs) • Printing (printing of setting and registration data, and FBD data) Specifications Item Tool functionsProgram execution methods Note 1) • Process CPU (upper five digits of serial No. "04042" or higher)• Free program memory equivalent to the compiled program size is required. An SRAM memory card is required when there is not enough open program memory. The history of the past 2,000 alarms (alarms determined for each loop control tag, and alarm tag alarm messages) is displayed.• The faceplate of the tag displayed in the alarm can be displayed. • The alarm list can be manually output as a CVS format text file.It is possible to start up the user-created screens. • The button ActiveX control to display faceplate is available. By pasting these on an ActiveX control support tool of VB, and setting the properties, the faceplate can be displayed, monitored and operated with an external application. (The PX Developer's monitor tool must be in the executable state.)• Using the VB program, the tag data can be read with the tag name ("FIC001.PV", etc.), but it is not applicable to write data with tag name.• Buzzer stop, screen hard copy, screen arrangement, search (face plate search with tag name, group name), operation mode control (lock, operator, engineer).• A graphic screen creation function is not available. Use the tools recommended below. • SoftGOT screen creation software • EZSocket partner SCADA/monitoring product (InTouch, ASTMAC, etc.) The pop-up faceplate has pop-up style appearance. It appears when pressing "Detail" button. Pop-up tuning screen has same functions as faceplate, tuning trend graph and tag monitor. • The tuning trend displays the PV, MV and SV values of that tag (loop) as a real time/historical trend.• The real time trend's collection cycle is fixed to two seconds. The historical trend can record up to 10,000 points (5.5 hours). It is possible to export trend data in CSV format.• Up to 16 tags can be simultaneously monitored with the pop-up faceplate and tuning screen, but only up to two screens can be opened (tag number). (The remaining 14 tags are monitored in the background.)• The tag monitor monitors the details of that tag's items in the online state. The details of each item can be changed online.• Auto tuning is available for loop tags from the pop-up tuning screen. The history of the past 2,000 events (user operation history, event messages determined for each digital tag, event message for message tag) is displayed. • It is possible to export event history in CSV format. The time series transition of the detailed value of each tag data item value is displayed as a historical/real time trend graph.• 8 items/screen (one group) x Maximum 125 screens = 1,000 items • Collection cycle : 1 sec./10 sec./1 min./5 min./10 min.Recordable time :• It is possible to export alarm history in CSV format.Collection cycleRecordable time10 sec.27.7 hours1 sec.2.77 hours1 min.6.9 days5 min.34.7 daysTrend graphAlarm listdisplayUser-created screen Tag dataexternal I/FMiscellaneous Event listdisplayPop-up faceplate,pop-up tuning screen 10 min.69.4 days

4

Automatic assignment of device memory address

PX Developer automatically assigns the device memory addresses for the created loop control program in the process CPU. This eliminates the complicated manual assignment and management of device memory addresses. (Manual assignment is also possible.)

8

Powerful tuning and monitor functions

The PX Developer has various screens (face plate, tuning trend, alarm, event list, etc.) used to tune, monitor and operate the created control loop. Tuning and monitoring are available after creating the program.

Specifications

Programming tools

SpecificationsProgramming languagesNumber of programs Number of tagsTarget personal computerProcess functions Target CPU
Monitor functions ➀ Seven types of compensation operators (polygon, inverted polygon, moving average, engineering value conversion, engineering value reverse conversion, temperature pressure compensation, retentive) � Five types of arithmetic operators (addition, subtraction, multiplication, division, extraction for process control) ➂ Five types of comparison operators (comparison>/FB/function types

1716