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SECTION 5 - SERVICE
Style B Solid State Starter Interface
Style B Solid State Starters produced before June 2008
can communicate with the 031-03630-007 Microboard
via the Opto-coupled COM5 serial data port (J15) us-
ing YORK proprietary protocol. The serial data is rep-
resented by +5VDC and 0VDC logic levels. TX data
to the starter is at J15-1. RX data from the starter is at
J15-2.
Style B Solid State Starters produced after mid 2008,
communicate with the 031-03630-007 Microboard via
the COM 2 serial port (J13) using RS-485 Modbus pro-
tocol. The COM 2 Modbus communications may use
the fiber optic interface for better noise immunity and
elimination of potential ground loop problems when
the Solid State Stater is equipped with the compatible
02505 Logic/Trigger control board.
When SSS-Mod B is selected as the motor drive type
on the SETUP Screen, additional setpoints must be en-
tered on the screen. The appropriate serial port (COM
2-Modbus or COM 5 YORK) must be enabled using
the Motor Communications Protocol setpoint. The se-
lections are Modbus or "YORK". When Modbus is
selected, the Motor Node ID setpoint must be set to
match the setting of the Starter Logic/Trigger Board
Modbus Address Switch SW1. They must be both be
set to "1".
Variable Speed Drive Interface
Variable Speed Drives produced before March 2007
communicate with Microboard 031-03630-007 via the
Opto-coupled COM5 serial data port (J15) using the
YORK proprietary protocol. The serial data is repre-
sented by +5VDC and 0VDC logic levels. TX data to
the starter is at J15-1. RX data from the starter is at
J15-2.
Variable Speed Drives built after March 2007 commu-
nicate with Microboard 031-03630-007 via the COM2
serial data port (J13) using RS-485 or fiber optic Mod-
bus protocol.
With Microboard 031-03630-007 when "VSD-60Hz"
or "VSD-50Hz" is selected on the SETUP Screen as
the Motor Drive Type, additional setpoints must be
entered on this Screen. The appropriate serial port
(COM2-Modbus or COM5-YORK) must be enabled
using the Motor Communications Protocol setpoint.
The selections are Modbus or "York". When Modbus
is selected, the Motor Node ID setpoint must be set to
match the setting of the VSD Logic Board Modbus Ad-
dress Switch SW3. They must be both set to "1".
208
There are two different types of Modbus protocol used.
Modbus ASCII for Mod D/Vyper and Modbus RTU for
Raptyr. When VSD – 60Hz or 50Hz is selected for the
Motor Drive Type setpoint on the SETPOINTS Screen,
the microboard will poll on COM 2 alternating between
the two protocols until one of them responds or until
an initialization fault occurs. Once a valid response is
received from either VSD type, the microboard will
"remember" this, even after a power failure. This al-
lows the correct screens to be displayed after a power
failure, without repeating the poll interrogation as long
as the Motor Drive Type is not changed. Once the mi-
croboard determines which VSD type is connected, it
will not poll for the other.
Medium Voltage Solid State Starter (MV SSS)
and Medium Voltage Variable Speed Drive
Interface (MV VSD)
These drives communicate with the microboard via
the COM2 RS-485 Modbus serial port (J13). Refer to
Medium Voltage Solid State Starter – Service (Form
160.00-M5) and Medium Voltage Variable Speed Drive
– Service (Form 160.00-M6) for details of this inter-
face. When the MV SSS or MV VSD is selected on
the SETUP Screen, the COM2 serial port with Modbus
protocol is automatically enabled. With the MV VSD,
the Adaptive capacity Control functionality is con-
tained on the microboard.
Printer Interface
An optional printer can be connected to COM1 RS-
232 serial data port (J2). TX data to the printer is at
J2-4. The DSR (Data Set Ready or busy) signal from
the printer is at J2-2. Signal levels are standard RS-
232. The microboard sends data to the printer at the
selected baud rate until the printer buffer becomes full,
where-upon the printer asserts its Busy signal. The mi-
croboard suspends data transmission until the printer
can accept more data. Each printer must be setup/con-
figured to operate properly with the microboard. The
Baud, Data Bits, Parity and Stop Bits must be pro-
grammed on the COMMS Screen. Other printer setup
is performed on the Printer Screen.
SC-EQ Communications Interface Card
An optional SC-EQ communication card can be con-
nected to the COM 4B RS-232 serial data port (J2).
TX data to the SC-EQ is at J2-7. RX data from the SC-
EQ is at J2-6. Signal levels are standard RS-232. The
SC-EQ polls system pressures, temperatures and status
from the microboard. It holds it for retrieval by third-
FORM 160.87-OM1
ISSUE DATE: 8/24/2018
JOHNSON CONTROLS
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