Carbolite nanodac - Manual (Page 43)

nanodac™
41
MC27 –EN–1.04
A pair of animated indicators in the top left-hand corner of the screen show the connection status of the
two possible slaves. A green moving ‘streak’ indicates that successful communications are being carried
out. A red flashing circle indicates that there is a break in the transmission line or that the slave is
switched off. A grey, non-animated display indicates that that slave has not yet been configured as a part
of the communications link (i.e it is ‘off line’).
A ‘traffic light’ indicator appears to the right of each parameter. Green indicates that the parameter is
being read from or written to successfully. Orange indicates that a write of the value is pending. Red
indicates that there is an error and that no value is currently being read or written; the value displayed is
the last good value read or written depending on whether the data item is a read or write. If the indicator
is black, the parameter is ‘off’.
Operation of the scroll key highlights the page symbol in the top right-hand corner of the screen, and a
further operation of the scroll key calls page two to the screen.
Page two contains the IP address of the Modbus master and of any slaves connected to it, together with
some diagnostic information, as described in ‘PING DETAILS’ below.
Figure 1.4.12a Modbus Master display pages
Promote List
Chan 1 Tmp
Chan 2 Tmp
VChannel 1 PV
VChanne 2 PV
VChannel 3 Input
Any Channel alarm
Dig In 1
Parameters
and values
195.6
199.7
4.1
-23.9
13
Active
Off
Modbus Master
Chan 1 Tmp
Chan 2 Tmp
VChannel 1 PV
VChanne 2 PV
VChannel 3 Input
Any Channel alarm
Dig In 1
198.3
200.3
2.0
-20.0
122
Active
Off
Modbus Master
nanodac
123.123.123.120
nanodac
123.123.123.123
26684
1
Ping
3rd Party
123.123.123.124
0
0
Ping
Connection status Parameter status
Read/Write
Page symbol
The list of parameters can be scrolled through using the
up/down arrows. Values being read by the master are
read only, but the user may enter values for parameters
being written by the master, by highlighting the
relevant item and using the scroll key to enter edit
mode.
The use of the Page key causes a return to be made to
the initial Modbus Master display.