9.2 – RS2 / RS4 Output
9.2.1 – Introduction
The RS232C output option consists of an additional card (reference
RS2
) that is installed in the M2 plug-in connector of
the instrument’s main board. The card incorporates one 4 wires telephone socket with output at the rear of the
instrument.
The RS485 output option consists of an additional card (reference
RS4
that is also installed in the M2 plug-in connector of
the instrument’s main board. The card incorporates a 6-pin / 4-contact telephone socked with output at the rear of the
instrument.
The serial output permits to construct a communication line through which a master device can request the transmission
of data such de display value, setpoint values, peak, valley, tare (or offset in case of thermometers) and to perform
operations such as tare of the display, reset of the peak, valley or tare memories and update setpoint values..
The output option is totally software configurable as for the transmission rate (1200, 2400, 4800, 9600 or 19200 Baud),
the instrument’s address (from 00 to 99), the protocol (ASCII, ISO 1745 and MODBUS RTU).
The operating mode is half-duplex and it normally stands in data reception mode until reception of a message.
A valid data transmission may cause the immediate execution of an action (tare, reset of peak, valley or tare memories
modification of setpoint values) or the transmission of a response from the instrument (display value, one of the setpoints
value, peak, valley, tare / offset). Only the display value can be called up via external contact according diagram in page 9
of RS2 manual.
Three communication modes are available; the ASCII mode uses a simple protocol compatible with several DITEL
instruments. The ISO mode, in accordance with the ISO 1745 norm, allows a more effective communication in noisy
environments as it checks the messages validity checking both transmission and reception. And eventually the protocol
MODBUS RTU
As you will see in the functions table, the protocol ASCII uses 1 or 2 bytes according to the command type and the
protocol ISO 1745 imposes the use of two bytes per command.
48
48
9.2 – RS2 / RS4 Ouput
9.2.1 – Introduction
The RS232C output option consists of an additional card (reference
RS2
) that is installed in the M2 plug-in connector of
the instrument’s main board. The card incorporates one 4 wires telephone socket with output at the rear of the
instrument.
The RS485 output option consists of an additional card (reference
RS4
that is also installed in the M2 plug-in connector of
the instrument’s main board. The card incorporates a 6-pin / 4-contact telephone socked with output at the rear of the
instrument.
The serial output permits to construct a communication line through which a master device can request the transmission
of data such de display value, setpoint values, peak, valley, tare (or offset in case of thermometers) and to perform
operations such as tare of the display, reset of the peak, valley or tare memories and update setpoint values..
The output option is totally software configurable as for the transmission rate (1200, 2400, 4800, 9600 or 19200 Baud),
the instrument’s address (from 00 to 99), the protocol (ASCII, ISO 1745 and MODBUS RTU).
The operating mode is half-duplex and it normally stands in data reception mode until reception of a message.
A valid data transmission may cause the immediate execution of an action (tare, reset of peak, valley or tare memories
modification of setpoint values) or the transmission of a response from the instrument (display value, one of the setpoints
value, peak, valley, tare / offset). Only the display value can be called up via external contact according diagram in page 9
of RS2 manual.
Three communication modes are available; the ASCII mode uses a simple protocol compatible with several DITEL
instruments. The ISO mode, in accordance with the ISO 1745 norm, allows a more effective communication in noisy
environments as it checks the messages validity checking both transmission and reception. And eventually the protocol
MODBUS RTU
As you will see in the functions table, the protocol ASCII uses 1 or 2 bytes according to the command type and the
protocol ISO 1745 imposes the use of two bytes per command.
