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SmartVue Operator’s Manual
10-0004-R13
69
DTC Icon
If there are one or more devices listed on the J1939 Diagnostics
Configuration screen and one (or more) is transmitting a DTC, then
the DTC icon shown here will be displayed in the upper right
corner of the display.
11.0
Serial Data Communications
The SmartVue is equipped with one RS-232 serial interface and one RS-485 serial
interface for serial data communications. Each is independent of the other and can have
their own separate configuration settings. The following serial communications modes
are available:
Stream – Textual lines with comma separated fields of data selected from process
data, IO data, and J1939 SPN, and DTC data. The data output is organized with
the same format as Ethernet data communications described in section 9.4.
MB Master/Slave ASCII – (Used for Modbus serial communications) Modbus
ASCII uses ASCII characters to represent the data and uses LRC error checking.
More bytes are needed to transmit message content than with MB RTU.
MB Master/Slave RTU – (Used for Modbus serial communications) Modbus RTU
uses binary coding and CRC error checking. Fewer bytes are needed to transmit
message content than with MB ASCII.
Since MB ASCII and MB RTU are incompatible, you must know how the device that the
SmartVue is communicating with is configured and then configure the SmartVue to use
the same method. Refer to section 12.0 for setting up Modbus Register.
Figure 11-1 Wiring to hook up a serial RS232 device