Section 7: Frequency converter control via RS-485 communication link
7.2.
Map of registers accessible through RS-485 link
All registers are 16-bit numbers. Register addresses (decimal) that are omit-
ted are not supported.
Table 7.2. Registers
The address
of the re-
gisters
Description (meaning)
Mode
REGISTERS OF OPERATING MODES
2000
The register RS CONTROL. The data is only valid
when parameter 4.07 (RS permission) allows the sys-
tem to work with RS. The meaning of bits:
bit 0 –
not used
bit 1 – the sequence 0 → 1 → 0 erases the message
on failure
bity 2,3 –
not used
bit 4 - 1 = force PI reference from RS (register 2002)
bit 5 - 1 = force frequency reference from RS (register
2001)
bit 6-1 = Force START / STOP control from RS
bits 7,8,9,10,11,12,13,14 –
not used
bit 15 – 1 = START 0 = STOP
Bits 4,5,6 allow to force control of the converter
through RS communication links even if
referencing-units or source of START / STOP signal
are set up on value which differs from RS. If, for ex-
ample, the referencing-unit A is set up on value "RS",
then in oder to set frequency with RS, it is not neces-
sary to set up bit 5. Forcing of control with RS by
means of bits 4,5,6 results in switching off a source of
the control established with parameters.
Bits 12,13,14 block operation of the system irrespect-
ive of the established type of control
(also when, for example, there is control through RS
and bits 15 = 1).
Read/ write
The last value
written down in
this register
cab be read.
2001
The RS frequency referencing-unit operates only if
the parameter 4,07 (RS permission) allows operation
with RS.
Resolution 0,1Hz *), a range - 32000...32000
e.g. 2500 = 25.0 Hz clockwise rotation
e.g.-1220 = 12.20 Hz anti-clockwise rotation
*)CAUTION: in Vector mode, the value is expressed
in revolutions per minute (rpm).
Read/ write
48
TWERD Power Electronics
