PACSystems VersaMax Genius Network Interface User Manual Section 4
GFK-1535D Jan 2023
Configuration 70
Data Rate (bps): Data transmission rate (in bits per second) for PC to NIU
serial communications via the NIU’s expansion port. The default is 19200.
Choices are 4800, 9600, 19200. When a programmer is first connected to
a fresh GNIU, the NIU uses the default communications settings: 19,200
baud, odd parity, one start bit, one stop bit, and eight data bits. If these
parameters are changed by downloading a different configuration, the
revised settings for the serial port are not installed until the programmer
is removed. Once these new settings take effect, the NIU will continue to
use them even if its power is cycled.
Parity: Determines whether parity is added to words for PC to NIU serial
communications via the NIU’s expansion port. The default is Odd. Choices
are Odd, Even, None.
Stop Bits: Number of stop bits used in transmission for PC to NIU serial
communications via the NIU’s expansion port. (Most serial devices use
one stop bit; slower devices use two.). The default is 1. Choices are 1, 2.
Expansion Bus Speed: If the I/O station has one or more Isolated
Expansion Receiver Modules (IC200ERM001), the default bus speed is
250kHz (“Extended Distance”). If the bus is less than 250 meters, this
parameter can be changed to “Normal” (1MHz). If no Isolated Receiver
Module is present, the bus speed defaults to Normal (3Mhz). The default
is Extended Distance. Choices are Extended, Normal.
Network Tab: On the Network tab, configure the parameters of Genius
communications, and the Redundancy operation of the Genius NIU.
Figure 50: Network Tab
Serial Bus Address: There are 32 available addresses (from 0 to 31) on a
Genius bus. Typically, one SBA, SBA 0, is reserved for the Genius Hand-
held Monitor. Another SBA is needed for each Bus Controller on that bus
(typically SBA 31, 30, and 29). Duplicate bus addresses disrupt
communications and are not permitted.
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