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All M-series Super PLCs features two independent serial ports (1 RS232 and 1 RS485) that speaks both MODBUS ASCII and RTU protocols fluently! These super PLCs can work happily with many other third party MODBUS masters or slave devices or with other super PLCs, thereby providing an open system solution as well as is guarding against . It is ready to interface to vast majority of other industrial software and hardware as described below.

1. SCADA Software Interface
scadapic.gif (12333 bytes)
The SCADA is the MODBUS master and the PLC works as the slave.

Most of the well known SCADA (Supervisory Control and Data Aquisition) software do come with MODBUS drivers which can immediately and painlessly interface with the super PLCs. The following brands are some of those that are either tested or  known to work with the super PLCs:

RIDDER's write you software to meet your needs. We make your interface as you like it.

1. National Instrument's Lookout
2. Elipse Software
3. Wonderware
4. Intellusion

2. Human Machine Interface (HMI)

OPS6HMI.jpg (9204 bytes)

The HMI is the MODBUS master and the PLC works as the slave. The PLC's serial port is fully configurable from 300 to 500kbps, 7/8 data bit, 1/2 stop bits. odd/even/no parity and should work with most HMI on the market.

HMIs are mostly standalone graphical LCDs with touch-screen display. The HMI are mostly designed to work with PLCs using RS232 or RS485 and most of them do support the MODBUS protocols.

The follow HMI are either tested or known to work with the super PLCs

Use RIDDER's Panel-PC systems

1. Maple Systems
2. Taian HMI
3. Optimation HMI
4. GE-Fanuc Quickpanel
5. Pro-face
6. Hakko


3. Controlling External RTU Devices

rtuslave.jpg (16062 bytes)

Any M-series Super PLC can also act as the MODBUS master controlling other MODBUS ASCII or RTU slave devices. This is accomplished incredibly easily using the built-in READMODBUS and WRITEMODBUS commands supported by TBASIC. 

The ability of the Super PLC to work as MODBUS host eliminates the need to use a host computer just to collect data from a few MODBUS or RTU devices. The T100MD1616+ can take the place of the host computer for a much lower cost of deployment,   more compact and much more reliable in the hostile industrial environment.


The Super PLC's Dual Independent MODBUS Ports

Amazingly, even the lowest cost T100MD888+ super PLC comes with two independent UARTs for its two serial ports: COMM1 is an RS232 port and COMM3 is an RS485 port. Both comm ports support MODBUS ASCII and RTU and can run simultaneously! The built-in RS485 port means networking a number of super PLCs will cost you extra $0.00 - (except maybe only for the price of the twisted pair cable). You can therefore connect as many as 32 super PLCs to a SCADA host very cost effectively.  By replacing the standard RS485 driver with 1/4 or 1/8 power type (e.g. Linear Technology LTC1487) as many as 256 PLCs can be networked together and pay next to nothing!

Another possible application is to use the RS485 for inter-networking between the PLCs so that data can be shared between the PLCs.   You can use the MODBUS protocol or the native protocol to accomplish this networking function. Hence you can have a network of super PLCs in a big system (such as building automation control) networked together by the RS485 , at the same time each PLC node can talk to other MODBUS host or slave devices using its RS232 port. No other PLCs in the market today can  rival the vast communication flexibility of the M-series super PLCs regardless of their price! This makes the T100MD1616+ an ideal choice for all applications from standalone machine controller to large systems employing hundreds of PLCs

networking.jpg (49741 bytes)

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