VorTek SonoPro S36 Series, Instruction Manual

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Series S36 Instruction Manual Chapter 4 Serial Communications
800120 4-9
Exception Status Definitions
The Read Exception Status command (function code 07) returns
the exception status byte, which is defined as follows. This byte
may be cleared by setting “coil” register #00008 (functi on code 5,
address 7, data = 0xff00).
Bit(s) Definition
0-1 Byte order (see Modbus Order on page 2)
0 = 3-2:1-0 1 = 2-3:0-1
2 = 1-0:3-2 3 = 0-1:2-3
2 Not used
3 Not used
4 Not used
5 Not used
6 Not used
7 Configuration changed
Discrete Input Definitions
The status of the three alarms may be monitored via the Modbus
Read Discrete Input command (function code 02). The value
returned indicates the state of the alarm and will be 1 only if the
alarm is enabled and active. A zero value is transmitted for alarms
that are either disabled or inactive,
Registers Variable Function Code Address
10001 Alarm #1 state 02 0
10002 Alarm #2 state 02 1
10003 Alarm #3 state 02 2
Control Register Definitions
The only writeable registers in this implementation are the Reset
Exception Status, Reset Meter and Reset Totalizer functions,
which are implemented as
“coils” which may be written with the
Write Single Coil command (function code 05) to address 7
through 9, respectively, (register #00008 through #00010). The
value sent with this command must be either 0x0000 or 0xff00, or
the meter will respond with an error message; the totalizer will be
reset or exception status cleared only with a value of 0xff00.
Error Responses
If an error is detected in the message received by the unit, the
function code in the response is the received function code with the