JOHNSON CONTROLS
301
SECTION 8 - MICROPANEL
FORM 201.23-NM2
ISSUE DATE: 3/9/2015
8
The table below shows the minimum, maximum, and default values.
TABLE 25 - MINIMUM, MAXIMUM AND DEFAULT VALUES
DESCRIPTION MINIMUM MAXIMUM DEFAULT
DE MODIFIER ADDRESS -1 41943 -1
DE MODIFIER OFFSET -1 99 -1
P1 BAUD RATE 1200 76800 4800
1200, 4800, 9600, 19200, 38400, 76800, AUTO SELECTABLE
P2 BAUD RATE 1200 57600 1200
1200, 4800, 9600, 19200, 38400, 57600 SELECTABLE
P1, P2 MANUAL Mac AD-
DRESS
-1 127 -1
P1, P2 PARITY NONE IGNORE NONE
NONE, EVEN, ODD, IGNORE SELECTABLE
P1 PROTOCOL BACNET API BACNET
BACNET, API SELECTABLE
P2 PROTOCOL TERMINAL MODBUS CLIENT API
TERMINAL, MODBUS IO, MODBUS SERVER, API, MODBUS CLIENT SELECTABLE
P1, P2 STOP BITS 1 2 1
RESET REAL TIME ERROR NO YES NO
The Chiller Control Board contains a dual UART for
RS-485 and RS-232 communications. UART1 is dedi-
cated to RCC and ISN communications over an RS-
485 link. UART2 is dedicated to internal communica-
tions within the chiller. The RS-485 port is configured
for 4800 baud, 1 start bit, 8 data bits, odd parity, and
1 stop bit. Connections for ISN communications are
on the Chiller Control Board on TB1/TB2. TB2 on the
Microgateway is utilized for ISN comms connection.
P3 is RS485+, P2 is RS485-, and USHL is the shield.
FIGURE 60 - CONTROL BOARD CONNECTIONS
LD10637
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