GE P485 - Manual (Page 34)

4–12 P485 MODBUS TO PROFIBUS CONVERTER – USER GUIDE
SOFTWARE OVERVIEW
P485/D485 configuration
PARAMETER WINDOW By selecting 'P485/D485 ' in the Navigation window, basic configuration options for the
sub-net will appear in the Parameter window.
Figure 4-6: P485/D485 configuration
• Physical interface: Currently, the P485 supports only a serial interface. The
communication settings for the selected interface are available under 'Modbus
Network (see Serial interface settings on page 4–13 for details).
• Control/status byte: This parameter is used to enable/disable the control/status
registers (see Control and status registers on page 8–1 for details).
– Enable: enable control/status registers. The “Data Valid” parameter (bit 13 in the
control register) must be set by the fieldbus control system to start the sub
network communication.
– Disable: Disables control/status registers.
– Enable but no start up lock: The control/status registers are enabled, but the
fieldbus control system is not required to set the “Data Valid” parameter (bit 13 in
the control register).
• Module Reset: This parameter defines how the module should behave in the event of
a fatal error. If Enabled, the module will reset and restart on a fatal error event, and no
error will be indicated to the user. If Disabled, the module will halt and indicate an error.
• Protocol: The P485 supports Modbus RTU master mode.
• Statistics: If enabled, the receive counter location indicates the number of valid
messages received from the subnet. If enabled, the transmit counter location
indicates the number of messages sent to the sub network. This function is used
primarily for debugging purposes.