Password, Port# ID Remap | B&B Electronics MESR9xx instruction

B&B Electronics MESR9xx manual Password, Port# ID Remap, Serial Interface Modes

4. Properties

Vlinx MESR9xx Modbus Gateway

Password

When you first receive the MESR9xx 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 Vlinx Manager. The password is used to access the configuration pages from the Vlinx 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). Typically uses DB-9 connectors but terminals are also used on MESR9xx Modbus gateways.

•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. Typically uses two shielded twisted pairs and screw terminals but DB-9 connectors are also used on MESR9xx Modbus gateways.

•RS-485 2-wire - Similar speed and distance specifications as RS-422 but allows multidrop connections. Typically uses one shielded twisted pair and screw terminals but DB-9 connectors are also used on MESR9xx Modbus gateways.

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MESR9xx specifications

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