ProSoft Technology 5202-DFNT-GRCM4 - Manual (Page 15)

3 Modes of Operation
The module can operate in two different modes with each port acting independently. The
configuration of each port’s driver determines its mode of operation. The following sections
describe these modes.
3.1 Data Flow
The following sections detail the flow of data between the pieces of hardware (GRC device and
ProLinx Module). Each application port on the module is configured independently to interface
with serial communication devices.
3.1.1 Receive Mode
A port on the module configured to function in receive mode is set up to receive multiple response
data from a command to a GRC device. In this mode, the ProLinx module will never transmit
data back to the GRC device. Any data received from the GRC device is passed from the
receiver driver (Rx Driver) to the ProLinx module’s internal database (Rx Data). This mode will
only be activated by functions FB_ART_NAMES (1), FB_SENDEN (3), FB_PD (16),
FB_ABLAGEN (17), and FB_FILLHEADS (18). The following diagram shows the flow of data on
a port configured for receive mode.
3.1.2 Configuration Mode
A port configured in configuration mode can send and receive configuration data from a GRC
device according to the command issued. Data flow to and from a GRC device is handled by the
module’s transmit and receive drivers. Data received from the GRC device is stored in the
module’s internal database in the configuration area. The following diagram shows the data flow
when the port is configured for configuration mode:
ProLinx Communication Gateways, Inc. 15
06.PLNX.GRCM.OO.01.EN
July 2003