N-Tron ESERV-M12T, User Manual

Page: 28 / 71

Properties ESERV-M12T Modbus Gateway ESERV-M12T Modbus Gateway
23 ESERV-M12T (Rev. 1210)
PASSWORD
When you first receive the ESERV-M12T Modbus gateway from the factory the Password is blank so that you can
initially access the Modbus gateway without entering a value into this field. To ensure security you should create
and save a password the first time you configure the Modbus gateway. After a password has been set up it must
be entered each time you login to the Ethernet Modbus Gateway manager. The password is used to access the
configuration pages from the Ethernet Modbus Gateway Manager Login page and can be changed from the
General page.
PORT# ID REMAP
This allows the gateway to remap the Modbus ID to another ID on the serial port. This would be used when there
are two identical Modbus serial networks talking to Modbus TCP controllers.
The first box is the staring ID of a range you want to remap; the second box is the last ID of that range. If you are
just remapping one ID the second box is not filled in. The third box is the start of the remap range on the serial
port. The fourth box will auto fill in based on the range filled in the first 2 boxes. The range must check to make
sure it is a valid range, and does not overlap with any of the other ranges set. Up to 5 address ranges can be
remapped per port.
The default will have all the check boxes unchecked, and all fill in boxes blank.
SERIAL INTERFACE MODES
Four serial interface modes of operation are:
RS-232 - Point-to-point serial communications connection used by PC COM ports
and many other systems. Capable of baud rates up to 115.2 kbaud over short
distances (typically 50 feet).
RS-422 - Point-to-point communications using a transmit pair and a receive pair.
RS-422 can operate at higher speeds and longer distances than RS-232.
RS-485 2-wire - Similar speed and distance specifications as RS-422 but allows
multidrop connections.