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T100MD+ 
Ladder+Basic 
Data Entry/HMI 
Modbus/Scada 
Internet 
Excel Link 
T100MX+ 
Fibre Optics 
H-Series 
E10-Series 
Plc as I/O board 
PLC's In action 

 

RIDDER'S

Terlicht 45

9451 Kerksken

Belgium 

phone: 00-32-53-833512

fax: 00-32-53-840994

e-mail

ridders.pack@pandora.be

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The right support and after sales service. This is what we give you day after day and this 24/24 and 7/7

You can ask your questions direct by using ICQ when we are online. Our ICQ number is 163202313.

 If you do not have ICQ, please download it for free at www.icq.com

Thanks to the many built-in communication protocols, the Super PLCs also make more than great serial-based  I/O boards for PCs or Workstation!

You can use the T100MD's  RS232 port for straight forward connection to a  PC. With an RS232-to-RS485 adapter (such as the Auto485) as many as 31 super PLCs can be connected to a single PC to provide distributed I/Os at  up to 4000 ft away.  Click here to view a sample Visual Basic communication program which is provided to aid Visual Basic programmers to rapidly learn how to talk to our PLCs using the native protocol.

A T100MD+ not only offers analog I/Os and digital I/Os for the host PC, you can make use of its local intelligence to obtain special I/Os such as PWM  and Stepper Motor outputs, High Speed Encoder, Frequency Measurement or even Interrupt inputs!

The PC can also display messages on local LCD attached to the T100MD+ for a PC to send messages remotely to the factory floor, for example. These features are simply impossible to find on other serial-based "dumb" I/O boards.

The T100MD+ supports a few standard communication protocols as follow:

1) Native ASCII based protocols, e.g. "@01RI00nn*"
2) MODBUS ASCII protocol. e.g. ":01030000000102nn"
3) MODBUS RTU protocol (binary based).
4) OMRON C20H protocol (ASCII type).

Our proprietary ASCII based native protocol allows you to read or write to every I/O and internal variable within the PLC using a rather straightforward command/response exchange of ASCII strings. Please see the  T100MD+ User's Manual Chapter 3 and  4 for detailed description of these protocols. A

The MODUS ASCII and RTU protocols are simple but popular communication protocols and you can find  their documentation  at www.modbus.org. The memory mapping of T100MD PLC to the MODBUS registers can be found in Chapter 5 of the T100MD+ User's Manual.

In addition, you can even implement your own proprietary communication protocol using  the powerful TBASIC language! This allow a T100MD+ to be used with an obsure host computer that must use a certain fixed,  proprietary serial protocol to control external I/Os.


Every T100MD+ PLC has built-in TBASIC commands (such as NETCMD$, READMODBUS, WRITEMODBUS) for communicating with another PLCs or 3rd party MODBUS devices. Hence it is possible for one or more T100MD+ to be used as slave I/O boards for a master T100MD+ PLC. This makes it possible to use more analog or special I/Os than are available on a standard T100MD+ PLC for complex control tasks.

Example, in the arrangement shown below the master PLC could have access to 24 analog I/Os, 6 PWMs, 6 stepper controllers and 6 encoder inputs!

The following  sample TRiLOG programI files demonstrate how to map the I/Os of a M-series or H-series PLC's into a T100MD PLC.

Sample TRiLOGI program #1 - RemoteIO-Mseries.PC5
Sample TRiLOGI program #2 - RemoteIO-Hseries.PC5

Fibre Optics Communication

By using RS485-to-Fiber Optics converters, you can use the M-series PLCs as remote I/O boards via Optical Fiber!  This allows the communication cable to be laid across  open field where lightning risk can cause severe damage to copper wire based commuication links. On request by a customer we tested one such converter made by R.E. Smith (www.rs485.com, model FC485) as shown in the following diagram:


The plan is to have a master PLC collect data from the 20 plus slave PLCs in the plant floor and the data will become available to the corporate intranet for real-time production reporting and analysis via the corporate Intranet.  However, the customer requires that the master PLC be housed in the enterprise server room to acquire data from the 20 slave PLCs on the plant floor. The server room and the plant are in two separate buildings with a carpark in between and the company is located in a tornado country with multiple lightning strikes every year. Optical fiber is the only feasible means of communication. We tested the above setup and it works flawless and the customer now has a reliable, standalone master PLC automatically collect production data and delivered to the management via the web browser.

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Copyright(c) 2002-2003 Ridder's. All rights reserved.
ridders.pack@pandora.be

 

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