Protege System Controller Reference Manual

Communications Port Speed
The communications port speed defines the baud rate at which the ModBUS service will operate. The default
value for ModBUS is 9600 bits per second. If the speed or configuration is different adjust this setting to suit the
ModBUS master configuration.
SV001 Speed
9600
Use the [1] and [3] keys to scroll the communication port speed options and press [ENTER] to select the speed
displayed. For more information about the list control data entry refer to the section List Control Data Entry (see
page 344).
Communications Port Parity
The communications port parity defines the parity configuration for the communication with the ModBUS
master. This will default to Even Parity however this can be adjusted to suit the ModBUS master configuration.
SV001 Parity
Even Parity
Use the [1] and [3] keys to scroll the communication parity options and press [ENTER] to select the parity
displayed. For more information about the list control data entry refer to the section List Control Data Entry (see
page 344).
Device Address
When the unit is connected to a ModBUS communication network it must have a device address programmed.
The device address is typically provided by the automation company or defined by the SCADA system that is
being connected to. The address is programmed in Hexadecimal and can not be 0x00 or 0xFF.
SV001 Device
address: 01
Type the appropriate 2 digit device address, after each digit you must press [] and [] to move to the next
digit. When the desired device address is entered, press [ENTER] to save the programmed setting and move
to the next screen. For more information about hexadecimal data entry refer to the section Hexadecimal Data
Entry (see page 343).
i
The device address must be configured for a value below 0xFF and above 0x00, failure to configure
the address to an appropriate value will cause the system not to respond. Duplicate address will
cause communication failures with the ModBUS Master application.
Data Options
The data configure various communication settings that affect the operation of the ModBUS protocol.
SV001 Data
[--------]
To modify options, use the keypad as explained in section Entering Data Options (see page 344).
Option 1 – Log Comm Events
• Enabled the service log communication events that occur on the ModBUS system to the event buffer.
• Disabled the communication events will not be logged.
Option 2 – Log Comm Errors
• Enabled the service log ModBUS Communication errors that occur which relate to the requests of certain
objects and information outside the bounds of the interface.
• Disabled the errors will not be logged and requests that generate errors will be silently discarded.
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