Datalogic GWY-01-PBS-01 Specifications download pdf (Page 16)

GWY-01-DNT-01 MANUAL – REV. 02 CHAPTER 2:

GATEWAY OVERVIEW

PAGE 16 OF 67

CHAPTER 2:

GATEWAY OVERVIEW

2.1 OPERATING MODES

Subnet16 Gateways have two modes of operation: Subnet16™ and Mux32™.

Operating modes are set by configuring one of the eight DIP-switches on the unit’s

circuit board assembly (Refer to Section 2.1.3

for DIP-switch access and setting).

2.1.1 Subnet16™

Subnet16™ is an advanced feature-rich network protocol that supports a subset of

the EMS Mux32 legacy protocol. The advanced features implemented in the

Subnet16 protocol allow the Gateway to assign individual Node ID values

automatically to each RFID controller connected on the Subnet bus. Subnet16 also

allows the Gateway to detect when a new controller is connected to the Subnet or

when a controller “falls off the bus” (stops responding).

Through the Subnet16 protocol, the Gateway is able to store a backup copy of each

RFID controller’s custom configuration settings. In the event that an RFID controller

fails, the stored configuration settings can be automatically reassigned to a

replacement RFID controller.

Real-time clock functionality is supported in Subnet16 mode. Host-bound data

packets are automatically Time/Date stamped as they pass through the Gateway and

on to the host.

Many of the RFID commands supported by the Gateway and RFID controllers will

only function when the Gateway is in Subnet16 mode.

2.1.2 Mux32™

Mux32 is a well-established, multi-drop protocol incorporated into many of EMS’ prior

products including HMS-Series and LRP-Series RFID Controllers. Most, but not all,

HMS and LRP commands supported by MUX32 are also supported by the Gateway

(when in Mux32 mode). Legacy Mux32 controllers must support the “ABx Fast”

command protocol to work with the Gateway in Mux32 Mode. For more information

regarding ABx Fast, please see the ABx Fast Protocol – Reference Manual

available

online at www.ems-rfid.com

Many advanced Subnet16 features are not available when the Gateway is running in

Mux32 mode. RFID controllers must be assigned a unique Node ID number (via

Configuration Tag) prior to being attached to the Gateway’s Subnet.

Note that the Gateway does not support Node IDs 17-31. Node IDs 0 and 32 are

reserved for special cases described later in this manual.

NOTE: The Gateway communicates over the RS-485 physical layer using these two

protocols only, but it is not a generic RS-485 device.

RS-485 cabling requirements are the same for both protocols.

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