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M1260E Revised 12.05.06 Ver. 1 

Data subject to change without notice  

                     

© 

Copyright OMNIFLEX 

                                                                                  Part Number 8.0101.036  

Communication Standard 

Pin 

number 

RS232 RS485 

Do not connect 

Rx Data + (In) 

Rx Data (In) 

Rx Data – (In) 

Tx Data (Out) 

Do not connect 

Do not connect 

Tx Data+ (Out) 

5 Ground 

Ground 

Do not connect 

Vcc 

RTS (Out) 

Do not connect 

CTS (In) 

Do not connect 

Do not connect 

Tx Data – (Out) 

 
Serial Port Default Settings 
1.  The default Protocol is Conet/s. 
2.  The default Baud Rate is 19200. 
3.  The default Data Bits is 8. 
4.  The default Parity is None. 
5.  The default Stop bits is 1 Stop Bit. 
6. The default DTR/CTS Handshaking is Off. 
7.  The default DTR/CTS Timeout (ms) is 0. 
 
 Changing Serial Port Settings 
1.  Assemble the Maxiflex base as shown in Figure 1 with the M1260E fitted into the CPU slot  

and a suitable Maxiflex PSU in the PSU slot 

2.  Connect power to your system. 
3.  Connect the M1831 programming cable between the COM port of your PC/laptop and the 

programming port of the Maxiflex CPU. 

4.  Open Omniset and click on File->Connect->Maxiflex CPU TAB. 
Select the GROUP Configuration->Ports->Serial Port which is found in the left hand pane. 
Change your Serial Port settings by pointing the mouse to the ITEM you wish to change and 
clicking on the right mouse button and selecting the New Value option that pops up. Enter you 
new setting when prompted. Refer to screen grab below. 
             

                  

 

M1260E Revised 12.05.06 Ver. 1 

Data subject to change without notice  

                     

© 

Copyright OMNIFLEX 

                                                                                  Part Number 8.0101.036  

 

INSTALLATION  GUIDE 

Maxiflex P3 CPU 

M1260E 

 
Introduction 

This Installation Guide is intended to aid the fitment of the M1260E  CPU in the field.  For 
operating details of this product, refer to the Users’ Manual. Please read this Installation Guide 
first before installing this unit. 
 
The Maxiflex P3 CPU is designed specifically for applications requiring PLC programming, 
offering industry standard IEC61131 programming capabilities combined with powerful 
industrial network communications features.  
It is always fitted into the CPU slot of a Maxiflex master base, next to the PSU module. See 
figure 1. It has one port which is a configurable serial port. This port has a DIP switch for 
address and parameter settings.  
RAM is battery backed so that application program variables are not lost on power down, the 
battery will be connected if you have an Omniflex application loaded already.  If you are 
starting with a fresh CPU from stock the battery will need to be connected. 
 

Figure 1 : Module Positions 

 

 
 
Hardware Installation Procedure 

1.  If the BATTERY is required then connect jumper located in the front of the module, just 

above the DB-9 serial port connector. Remove paper strip which says PULL TO 
CONNECT BATTERY. The Real time clock must then be set. 

2.  If the CPU is going to be programmed use Programming port cable M1831 which is 

available as an accessory (Model No. M1831).  

3.  Plug the CPU into the CPU slot (as per Figure 1). 
 
 

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