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6.3.2 DHCP options
DHCP can be activated both via DIP switch 2 and via the "Network / bus settings" display menu. This
results in the following behavior:
When DHCP is switched on, the EM-PQ 2300 automatically obtains the IP address from a
DHCP server. Which IP address has been assigned to the device must be requested by the
EDP. It should be ensured that the EM-PQ 2300 is always assigned the same IP address.
In the optional EM-FD 2500 display, the static IP address is always displayed even when
DHCP is switched on, which only applies if DHCP is switched off.
DHCP can also be switched on or off on the EM-FD 2500 display, but the DIP switch setting
"ON" takes precedence.
If DHCP is used permanently, it should be enabled via the DIP switch.
If DHCP is switched off, the device will again use the network configuration that was valid
before the DHCP was switched on and is shown in the display EM-FD 2500.
If DHCP is turned on without a network cable connected, the device will not receive an IP
address. Even if a network cable is connected later, depending on the firmware version, there
is no automatic IP address assignment. Only after switching the EM-PQ 2300 off and on with
the network cable plugged in, the device receives an IP address from the DHCP server.
6.3.3 Fixed network IP address
IP address
192.168.0.57
Subnet mask
255.255.255.0
Gateway
none
DNS
none
6.3.4 Mode of the RS-485 interface
DIP switch 4 DIP switch 5
Function
OFF
OFF
FRAKO Starkstrombus
OFF
ON
reserved
ON
OFF
reserved
ON
ON
reserved
6.4 Terminating resistors on the Display bus
The terminating resistors incorporated in the devices at the beginning and end of the single-line bus must be
activated. There must be exactly two resistors switched in!
All FRAKO devices that can be operated on the Display bus are provided with an internal terminating resistor that
can be switched in and out. With the EM-PQ 2300, this is done with the configuration switch 1 (DIP switch 1).
When the switch is pressed down towards the base of the instrument, the internal terminating resistor is switched
in, otherwise the resistor is not in the circuit. No external resistors need to be connected to the Display bus!