Kistler-Morse KM Weigh II - Manual (Page 37)

Chapter 5. Inputs and Outputs
5-9
7. Press the Esc Key to return the
display to:
8. Press the Esc Key to scroll up the menu
tree or press the Auto/Man Key to return
the display to vessel monitoring.
Serl
The Serl Menu is used to set up serial
communications between the Weigh II and
external equipment, such as a printer, PLC,
Kistler-Morse MVS, etc. The Weigh II is the
master to a printer, but can only be the slave
to all other external equipment. The Weigh II
has one COM port for serial communications.
Refer to Appendix F, Technical Drawings, for
information on how to serially connect the
Weigh II to various external equipment.
The Weigh II’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 adjustable serial
communications settings — baud rate,
address, and mode of operation — can be
modified by the user, as described below
under those menu items. When connecting
the Weigh II to external equipment, all of the
serial communications settings must match
for the equipment to communicate. As
necessary, modify the default settings for
baud rate, address, and mode of operation of
the Weigh II. Modify the data bits, stop, and
parity settings in the external equipment to
match the Weigh II’s built-in settings.
Serl has two submenus, described below.
HideS
HideS 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.
Set
The Set Menu is used to modify the serial
communications settings. It has three
submenus, described below.
Baud
The baud rate (bits per second) is set up in
the Baud Menu. The baud rate determines
the speed with which the Weigh II communi-
cates with the PLC, printer, etc. There are five
baud rates available:
1200 2400 4800 9600 (default) 19200
Addr
External equipment may have many signal
processors daisy chain wired to it. The base
address of the signal processor identifies the
signal processor and the associated vessels
to the external equipment. Each device on
the same serial connection must have a
different base address. The base address of
the Weigh II’s serial 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 setting is 01 in decimal form
(01 in hexadecimal form).
Note
If you are connecting the Weigh II to a
Kistler-Morse MVS signal processor,
do not use a base address above 120
(decimal form). The MVS does not
recognize a base address above 120.
When Addr is selected, a typical display
looks like this:
The lower line of the display 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 Weigh II has a unique
serial address, based on the base address of
the Weigh II and the factory-set channel ID
number. The serial address of any channel is
calculated with the formula:
Channel Serial Address (hexadecimal form) =
Base Address (hexadecimal form )
+ Channel ID# - 1
CURRENT OUTPUT
Set Mode Rprt
F1 F2 F3
BASE ADDRESS
> 01 Dec/ 01 Hex
F1 F2 F3