This tutorial is intended as an overview of programless connecting of CelciuXº to the Siemens S7-300 PLC.

Components used: • EJ1N-TC__-__ • EJ1N-HFU_-___ • EJ1C-EDUA-NFLK • 24 Volt Supply • E58-CIFQ1 • S7-300 PLC • Renu GWY-00-B or GWY-S7 • Renu GWY-3.11 software + EJ1N-GWY-3.11 update (available in the product db)

Procedure:

• Connect the CelciuXº using the procedure described in “Connection to CX Thermo via USB port”. Execute Set-up for EJ1
• Connect the PC to the Siemens PLC and execute Set-up for S7-300
• Connect the PC to the GWY to program the gateway. Execute Set-up for GWY
• After set-up, connect the PLC, Gateway and CelciuXº
  CelciuX° can communicate OMRON NT-LINK via RS232 or RS485.
  Below you will find the RS232 connection:
  Note: for RS232 communication dipswitch 8 has to be “ON” at the HFU.
  Note:
  If you use a standard GWY-00-B, the driver for NT-Link must be manually added.
  If you use the specific GWY-S7, the driver is already included but a separate 5 VDC
  supply has to be included in de wiring to power the GWY unit.
  In the case of GWY-00-B it can use the standard 24 VDC supply for power.
  In the case of GWY-S7 power must be supplied via the 9 PIN D-Type and communications pins connected appropriately
  

Set-up:

• CelciuXº (EJ1N-HFU__):

• If not already done, connect PC to the HFU via E58-CIFQ1 USB cable
• Start CX-Thermo, select the programless communications editor
• Define the parameters. (example: DM0000 to DM0005 & DM1000 to DM1005).
  
• Download the parameters to the EJ1.
• Write down the DM registers range used in your Ej1 project.

• Siemens S7-300 PLC

• Always define MPI address 2, 187500 baud.
• Define on your PLC which addresses are to be used. (MW registers are always present. DBx.DBW. have to be created.)
• Program consecutive addresses, preferably in the same order as the EJ1 project.
• GWY-00-B
• Install RENU GWY 3.11
  (can be freely downloaded from RENU website ( www.renuelectronics.com)
• Unzip the “update for EJ1 on GWY3.11.zip” to its respective folders.
  (this update file can be find only in the product database at the moment)
• Start “Gateway 3.11.EXE”
• Select the “GWY-00”
• Select in the left column ‘Siemens S7-300 series PLC’ and the model you have.
  (if model is not available select the ‘generic (gen) PLC’)
• Select in the right column “NT Link”
  (if not present the update has not been zipped successfully)
  Use GWY software to setup two blocks for reading and writing parameters
• Select configure
  
• In the first line above you can see the mapping made for the 6 consecutive words (read) DM0000 to DM0005 being mapped to MW000 (to MW010)
  This means that:
  DM0000  MW000
  DM0001  MW002 etc.
• To add second line click “add-new” (bottom of screen, see image below).
• Define the 6 words to write DM1000-DM1005 (MW100-MW110)
• If you have mapped (aligned) the DM registers to the PLC registers we will need to map the communications parameters still
  
• Press PLC 1 set. These are the Siemens parameters. Nothing needs to be changed.
• Press PLC2 set. Set Baudrate to the match baudrate selected in EJ1.
  Press OK.
• From here your program is ready and can be downloaded in to the GWY-00B
• Connect the programming cable to your GWY (com1) and to the com port of your PC.
• Press download
• On next screen press “select all “ and select the used comport of your PC.
• Press download again and confirm the generated message.
• You will now see that the program will start a sequence in downloading, firmware, drivers and project. (do not disconnect or power-down)
• After download , restart the GWY-00B
• Now connect the EJ1 to PLC2 side and Siemens to PLC 1
• Restart the PLC and CelciuXº

Your EJ1 is now connected to the MPI bus of Siemens.

• Set the read-demand-flag MW100 (DM1000) to “2” to start the communication
• Read the process value (PV) from unit #1 loop 1+2 in MW008 and MW010
• To Change set value (SV) for unit #1 loop 1+2 set the required values in MW108 (DM1004) and MW110 (DM1005) AND set MW102 (DM1001) to “1” to force the setting change.
• Details can be found in the EJ1N User Manual H142