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Standby speed setting
on page 70
Normal speed setting
on
page 70
Timer setting and op-
tions
on page 71
Analogue signal options
on page 72
Electronic braking op-
tions
on page 72
Factory settings
on page
73
Assigning a multi-drop
address
on page 73
6.1.1 Message structure
The message structure and command set are the same for RS485 and RS232 options. To
communicate a message to the nEXT pump, the characters must be sent in a specific
order. If the message does not conform to the correct structure it will be ignored and no
reply will be sent.
The correct structure to use is as follows:
▪
a valid start character, either a '!' character for a store operation or a '?' character
for a query operation, followed by
▪
a command, which will be an upper case alphabetical character, followed by
▪
an object number, comprising three decimal digits, followed by
▪
for some commands only, a data field, comprising a sequence of characters
separated from the object number by a space, followed by
▪
a terminating carriage return.
The message protocol in multi-drop mode is marginally different, refer to
operation
6.1.2 Command and reply table definitions
Explanation of the command and reply characters.
Table 16 Command abbreviations
B8J200880_D
300812671_002_C3
B8J200880_D - Configuration
The pump can be run at standby speed rather than full rotational speed.
The standby speed is a user-configurable option and can be set to any value
between 55% and 100% full rotational speed.
The normal speed is a user-configurable setting and can be set to any value
between 50% and 100% full rotational speed.
The timeout period is a user-configurable option and can be set to any val-
ue from 1 to 30 minutes.
The analogue output can be used to monitor one of five different parame-
ters.
The pump is supplied with the electronic braking disabled by default.
The nEXT pump can be re-configured to its original factory settings with one
serial command.
Each individual pump must be programmed with its own multi-drop ad-
dress via a point-to-point connection before introduction into a multi- drop
network.
on page 46.
Abbreviation
cr
chars
d
h
Meaning
Carriage return character
Characters
Decimal ASCII character
Hexadecimal ASCII character
Page 67
Multi-drop
*
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