Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: (717) 843-0081
www.mhforce.com
Page 19
Rev. 3/2022
4215-HS Indicator
Manual
(PM-4101)
Digital Inputs
There are 4 digital inputs available on the Model 4215-HS. They are accessible on the Digital I/O connector on
the back panel (pins 9 - 16). These inputs are individually optoisolated and include current limiting resistors. An
input voltage anywhere from +4 to +22 volts DC may be used to obtain the “on” state. See Appendix B for a full
description of the Digital I/O connector. If you do not require isolation for your application you can use the +5
or +12 volt and GND available on the Digital I/O connector (pins 24-26).
These 4 inputs are called IN1 through IN4 and have the following standard functions:
•
IN1 will Tare the Load to zero while it is in the On state.
•
IN2 will Reset the Peak and Valley measurements while it is in the On state.
•
IN3 will Reset the Position measurement while it is in the On state.
•
IN4 will send one set of measurements (load, peak, valley, position, velocity, and limits) to the serial printer
when it transitions from Off to On.
Other functions may be assigned to these inputs by custom programming at the factory.
RS232 Operation
All the features and settings of the Model 4215-HS can be accessed remotely using the RS232 ASCII command
set. These commands fall into two groups: commands that are like Run Mode, and commands are like Setup
Mode.
The Model 4215-HS supports remote operation using a standard RS232 Interface consisting of ASCII characters.
The baud rate is set using the Com Baudrate item on the System Options menu. Supported rates are 300, 600,
1200, 2400, 4800, 9600, and 19.2k baud. There must be 8 data bits, no parity, and 1 stop bit. To support the
multi-drop RS232 option each unit is assigned a communications address which is set using the Com Address
item on the System Options menu. All the commands have the following format:
@123XYZ<CR> The @ symbol initiates the command, all commands must begin with this symbol. The number
123 is the address of the Model 4215-HS which should respond to this command. This MUST be 3 digits so
type 001 for unit one, and 026 for unit twenty-six. The command itself will be a sequence of letters such as the
XYZ shown above. If the command requires a number as one of its parameters the number must be followed
by the pound sign “#”. Numbers that are less than one should include a leading zero so you should type 0.123#
to enter one-hundred twenty three thousandths. Commands are not processed until a carriage return <CR> is
sent.
No Model 4215-HS will respond to address 000. All Model 4215-HS’s will respond to address 255. Throughout
the rest of this section we will assume that you are using address 123. Whenever an Model 4215-HS executes a
remote command it will issue an acknowledge that includes the address and any required data.
Remote Operation