STX Signal Transmitter Installation and Operation ... - Kistler-Morse

Chapter 6. MVS-STX Inputs and Outputs Menu
ADDR (address)
External equipment may have many signal
processors daisy chain wired to it. The signal
processor base address identifies the signal
processor and associated channels to the
external equipment. Each device on the same
serial connection must have a different base
address. The base address of the MVS’s
COM port is set up in the ADDR Menu. The
base address can be expressed in two ways
— decimal form (ranging from 0 to 255) and
hexadecimal form (ranging from 0 to FF).
The default is 01 in decimal form (01 in
hexadecimal form).
When ADDR is selected, a typical display
looks like this:
ENTER BASE ADDRS
> 01 Dec= 01 Hex
F1 F2 F3
The display lower line shows two number
fields. The first number is the base address in
decimal form. The second number is the
hexadecimal equivalent. The keypad is used
to input a number directly, or the Arrow Keys
can be used to scroll to a number. Only the
decimal form of the address can be altered by
the user; the hexadecimal form changes
automatically to correspond to the decimal
form. Pressing the Enter Key saves the new
value in memory.
Each channel in the MVS has a unique serial
address, based on the base address of the
COM port through which it is being addressed
and the factory-set channel ID number.
The serial address of any channel is calculated
with the formula:
Channel Serial Address (hexadecimal form) =
COM Port Base Address
(hexadecimal form) + Channel ID# - 1
Modem
If an RF modem is used on COM1, a
longer serial communications time-out may
be necessary to keep COM errors from
occurring. There are two choices for Modem:
• Yes
• No (default)
Selecting Yes in the Modem Menu lengthens
the communications time-out.
HidS (serial hide)
HidS disables or enables channels from serial
communications. This allows you to provide
only the desired information through the serial
port, such as sending math channel data
without vessel monitoring channel data.
There are two choices for HidS:
• Yes — disables channel from
serial communication
• No (default) — enables channel for
serial communication
Note
To establish serial communications
between the MVS and a stand-alone
STX, set the MVS’s COM1 to Master
and set the baud rate, data bits, stop,
and parity to match those for the STX,
described below.
STX
The STX PCB has one COM port. It can be
hardware configured to operate with the
following standard communication interfaces:
RS-232, RS-422, and RS-485. Refer to
Appendix H, Technical Drawings, for information
on how to serially connect the STX PCB
to various external equipment. Refer to
Table 2-1 in Chapter 2, Hardware Installation,
for the dipswitch settings to configure the
serial port on the STX PCB.
The STX can only be the slave to external
equipment. The STX’s built-in serial communications
settings are 8 data bits, 1 stop, no
parity. These values are fixed, and cannot be
modified by the user. The baud rate can be
modified by the user. There are five baud
rates available:
• 1200
• 2400
• 4800
• 9600 (default)
• 19200
When connecting the STX to external
equipment, all serial communications settings
must match for the equipment to
communicate. As necessary, modify the
default setting for baud rate of the STX.
Modify the data bits, stop, and parity settings
in the external equipment to match the STX’s
built-in settings.
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