100/180 mm PAPERLESS GRAPHIC RECORDER: USER GUIDE
User Guide
Page 163
HA028910
Issue 13 Sep 16
4.3.16 MASTER COMMS (Cont.)
TYPICAL CONTROLLER PARAMETERS (Cont.)
Channel Number Allows the user to select the number of the channel to be confi gured. As soon as
Modbus Master is selected as input type, this changes from ‘Channel 1’ (for example)
to ‘Read 1’. Once communication with the slave is established, this will change to the
descriptor of the remote channel (unless the controller type does not support this
item, in which case a suitable descriptor can be entered later in the confi guration).
Slave
Allows the user to select (from a picklist), the slave from which data is to be retrieved.
The picklist contains all the Remote Devices confi gured as slaves in the Master
Comms Confi guration described above.
Digital
Allows data to be read into a digital input.
Parameter
Allows the user to select a specifi c parameter (table 4.3.16a shows a typical set) or
‘User defi ned’ to be selected. ‘User defi ned’ allows a (decimal) register address to
be entered (see ‘User defi ned’, below).
Loop number
Allows the user to enter a Loop Number for the parameter read.
Process Value
Allows one of three rates to be set for reading the Process Value. The three rates
(Low, Medium and High) have the values set in the Master Comms confi guration.
Span
This ‘Span’ setting allows the Zero and Full Scale values for the parameter to be en-
tered.
Zone etc.
The remaining items are as described in Channel Confi guration in
section 4.3.3
.
Table 4.3.16a Typical Controller read parameters
Alarm status
Auto/Manual
Process value
Read alarm active status
Read alarm unacknowledged status
Working output power
Working setpoint
