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Figure 4-6 - Connecting the Gateway to the RS485 Network
4.2.1.
Gateway Board Numbering
The E2, Einstein, or REFLECS controller interprets the
PerformanceAlert™ Gateway board as one or more 16AI
Analog Input boards. The number of virtual "boards" is de-
pendent on two things: the setting of the board's address
DIP switch, and whether the PerformaceAlert Gateway
will operate in "Condensed" or "Expanded" data mode.
In Condensed mode, the Gateway behaves in the same
manner as one 16AI board whose address is equal to the
address set by the DIP switches (see Figure 4-7 on page 7).
In Expanded mode, the Gateway assigns each Perfor-
manceAlert™ module a 16AI address equal to its MOD-
BUS address. For example, when modules 1 through 8 are
enabled through the Gateway in Expanded mode, the Gate-
way behaves as eight 16AI boards numbered 1 through 8.
The address DIP switches have no function when the Gate-
way is set to Expanded mode.
Connecting the Gateway to the RS485 I/O Network
4.2.1.1. Setting the Gateway Address Switch
Figure 4-7 - Gateway Dip Switch Numbering
If using the PerformanceAlert™ Gateway in Con-
densed Mode, set the address DIP switches to the virtual
16AI board address you wish the Gateway to use (Figure
4-7). The Gateway in Condensed mode behaves in the
same manner as one 16AI board whose address is equal to
the address set by the DIP switches.
4.2.2.
Setting the Baud Rate Dip Switch-
es
Dip switches 6 and 7 (Figure 4-8) control the baud rate
at which the Gateway communicates with the site control-
ler on the RS485 Network. These switches must be set to
the same baud rate setting as the E2, Einstein, or REFLECS
(usually 9600 baud).
Dip switch 8 controls the baud rate on the MODBUS
network. Since the PerformanceAlert™ module communi-
cates at 9600 baud only, set this switch to the DOWN posi-
tion to select 9600 baud (see Figure 4-8).
MODBUS
BAUD
RATE
Networking • 7
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