How do I Change or Check the PLC IP Address?

To view the current IP address:

Viewing the screen integrated into the PLC inside the panel, press the down arrow until the system day, time, and date screen is visible. From here, you can press the ESC button to access the PLC menu. To view the IP address, use the arrow keys to highlight “Network” and press OK.

To change the current PLC IP address:

1) Viewing the screen integrated into the PLC inside the panel, press the down arrow until the system day, time, and date screen is visible.
2) From here, you can press the ESC button to access the PLC menu.
3) First stop the PLC program by selecting Stop (warning, this will shut down the unit if it is running), then selecting Yes.
4) To change the IP address, use the arrow keys to highlight “Network” and press OK. You can then highlight and change the IP address. Press OK when done,
5) Press ESC a few times to exit the menu, then press the up arrow a few times to get back to the main message screen
Please note, if your system has a door screen (HMI), you must also change settings, including the IP address, of the HMI screen for proper operation of the HMI.

Please note, if your system has a door screen (HMI), you must also change settings, including the IP address, of the HMI screen for proper operation of the HMI.

To change the HMI screen IP Address:

1) Using the arrows on the HMI, press down until you see the system day, time, and date screen, then press ESC.
2) The first option is LOGO! Selection. If you have changed the PLC (“LOGO!”) IP address, choose this option. You must enter the exact PLC IP address here so the HMI can resume communication with the PLC. Press ESC when done to exit to the main menu.
3) The last option in this menu is TDE Settings. Siemens refers to their HMI as a “TDE” (Text Display with Ethernet). To view or change the IP address, go to TDE Settings, then TDE Network.
4) In TDE Network you can view or modify the HMI (TDE) IP address. Please note that the first 3 sets of numbers (Network ID) must match the LOGO! PLC IP address and the last set of numbers (Host ID) must be unique. That is, if the LOGO! PLC IP address is 10.120.0.15, then the TDE HMI IP address must be 10.120.0.xxx, with “xxx” being unique from any other devices connected to the network that share the same Network ID.
5) Press ESC once done to exit the menus. You can also power cycle the panel to reboot the system, if needed.

What is the scaling for the temperature retransmit signal?

Depending on the exact system, the scaling on the temperature signal will either be –
1003°F to 2377°F or -323°F to 2377°F.

What inputs/outputs are available on my panel?

Please refer to the wiring diagram drawing for more information. Most systems include dry contacts for pilot status (open when the pilot is cold, closed when the pilot is lit and above 300°F), temperature retransmit for system thermocouples, and need a dry contact input for remote permissive (system ships with a jumper installed that can be left in place if the remote permissive is not being utilized). Additional inputs/outputs may be available, depending on the system. Please refer to the job drawings or contact Hero if you do not have them available.

What are the MODBUS settings?

Our systems use MODBUS TCP/IP (not two wire MODBUS or RS-485). Older systems in the field may no have MODBUS enabled, but it may be possible to update the programming to enable MODBUS. Please contact Hero for options and pricing.

For MODBUS TCP/IP, our systems ship with a default IP address of 192.168.0.10 or
192.168.0.3. MODBUS TCP/IP communications use Port 502. If you are interfacing with
a system that has an HMI, please connect your Ethernet cable to the extra port on the
back of the HMI.

What is are the MODBUS addresses/registers?

Hero’s default address tables are below. Please note that these include addresses/registers for options that may not be available on your system. Do note that some custom engineered systems may have address tables that do not match the ones listed here. Please contact Hero for additional information.

Why does my door screen (HMI) information not match the PLC screen information?

This is due to a communication issue between the PLC and HMI. If you have connected the system to your local network, please ensure that the LOGO! PLC connects directly to the HMI and you are utilizing the spare Ethernet port on the back of the HMI to connect to the control panel. If the IP address of the PLC inside the cabinet has been changed, then you must also change the settings in the HMI. Please refer to the IP address section on this page for directions on how to change the HMI IP settings.

What is the high temperature shutdown setting?

Please note that elevated flares do not have a high temperature shutdown. The
thermocouple is for confirming pilot status and not for temperature control or shutdown
of the flare.

For combustors, depending on the age, thermocouple location, and combustor model, the high temperature shutdown is between 1600°F to 1900°F. Do note that some systems have a built in timer that allows the combustor to briefly (5 minutes or less) exceed this temperature without shutting down. There is an addition high high temperature shutdown on these units of 2200°F that will shut down the combustor or close the burner immediately if this temperature is exceeded.

Can I record pilot status?

Yes, all of our systems ship with either system status or pilot status dry contacts that can be used to log, monitor, or record the pilot status. Many systems also include a temperature retransmit signal for either the pilot (for flares) or stack temperature (for combustors). Please refer to the wiring diagram specific to your equipment for additional information.