Analogue Input Value; Communications Input; Pen Values - Siemens SIREC D200 Manual

Analogue Input Value

Analogue readings in engineering units. 4byte IEEE floats using 2 Modbus registers per
reading.

Communications Input

Values can be sent to the recorder for inclusion in the Maths Block, using command 16 up
to 32 IEEE floats can be sent to the recorder. Using CV1 to CV32 in the Maths Block, these
values can be displayed on the pens.
i.e. P1 = CV1 will set Pen 1 to the engineering value set address 1880 with the function code
16. Once again these are 4 byte IEEE floats using 2 Modbus registers per reading.

Pen Values

Pen values in engineering units, 4 byte IEEE floats using 2 Modbus registers per reading.
266
Modbus Memory Map Supplement:
Figure 22.1 Comms variables
Comms variable to be
used in Maths block
CV1
...
...
...
...
CV32
CV33
...
...
...
...
CV64
So ECV1 @ 2400 is a different modbus
comms register but maps to exactly the
same place as CV1 @1880.
Both map to the comms variables CV1
Modbus registers
CV1 - 1880
...
...
...
CV32
ECV1 -2400
...
...
...
...
...
...
...
...
ECV - 64
43-TV-25-35 GLO Iss.4 Dec 06 UK
A5E01001767-04