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PLC Programs, Special Configuration and Communications
Skills you’ll gain: Learn the various types of programs, special configurations, and communication configurations to set-up your program.
Software Required
Hardware Required
- Maple Modular PLC’S – Any Maple Modular PLC can be used.
- Maple Micro PLC’S – Any Maple Micro PLC can be used.
Ladder Diagram Programs
Scan Program
- Typical Program
- Depending how long the program is, this is routinely being ran every so often.
- A scan does not get told to start or stop unless the PLC is in off mode or powered off.
- When the PLC turns on, it starts to scan
Subroutine
- This is a manual scan
- Does not routinely run on its own, it’s what you call upon.
Cold Start Initialization
- Buffers values into data registers before the first scanned program begin.
Hot Start Initialization
- Only use if you are experienced.
- Used for expected time frame and only used during this time.
- If you go over the expected time frame, you will lose all your data.
Periodic Interrupts
- A manual scan
- Told by a timeframe to turn on and off
- Example: 10 milliseconds to 60 seconds or sometime after 45 minute it will run after that time.
Special Configuration
Special Card Initialization
- Saves the setting values of a special card as a scanned program.
- Provides stored information automatically when there is a special card replacement that requires a reset without any additional operations connecting to the MapleLogic software.
- You DO NOT need the physical I/O card. You can still configure the special card settings.
To get a more detailed description on I/O Allocation please visit the “I/O Allocation and Online Communication” Tutorial Page.
PID Control
- 32 Loops
- Auto-tuning
- Trend View
- Converts parameters to ladder diagram
Positioning (or Pulse Output)
- 1:1 ratio
- Up time is the same as the down time.
PWM (Pulse Width Modulation)
- Need a PWM expansion module SD0032PPWM front
- Up and down time is not the same
- Example 3:1 or 2:3 ratio
- Changing the width of the pulse PWM graph
I/O Input Filter
- Configures the I/O for the Maple Modular PLC’s
- Up to 11 available I/O Modules ca be configured
Communication Configuration
Serial Protocol (User Protocol)
- Serial Communication (RS-232 and RS-485)
- Example: Can be used with barcode scanners
Modbus Communication
- The Maple Modular and Maple Micro PLC’s can communicate with ANY device that has Modbus RTU and TCP/IP capabilities.
Ethernet Protocol
- A TCP/IP User Protocol
SFC Program
- Sequential Function Chart
- Allows for parallel processing
Resources & Documentation
Maple PLC/MapleLogic Resources
More Tutorials Sample Projects
See our Support Center for a complete list of Quick Start and Installation Guides
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