FC101 Design Guide

Parameter commands master⇒slave
Bit number Parameter command
15 14 13 12
0 0 0 0 No command.
0 0 0 1 Read parameter value.
0 0 1 0 Write parameter value in RAM (word).
0 0 1 1
Write parameter value in RAM (double
word).
1 1 0 1
Write parameter value in RAM and
EEPROM (double word).
1 1 1 0
Write parameter value in RAM and
EEPROM (word).
1 1 1 1 Read text.
Table 7.5 Parameter Commands
Response slave⇒master
Bit number Response
15 14 13 12
0 0 0 0 No response.
0 0 0 1 Parameter value transferred (word).
0 0 1 0
Parameter value transferred (double
word).
0 1 1 1 Command cannot be performed.
1 1 1 1 Text transferred.
Table 7.6 Response
If the command cannot be performed, the slave sends
0111 Command cannot be performed response and issues
the following fault reports in Table 7.7.
Fault code FC specication
0 Illegal parameter number.
1 Parameter cannot be changed.
2 Upper or lower limit is exceeded.
3 Subindex is corrupted.
4 No array.
5 Wrong data type.
6 Not used.
7 Not used.
9 Description element is not available.
11 No parameter write access.
15 No text available.
17 Not applicable while running.
18 Other errors.
100 –
>100 –
130 No bus access for this parameter.
131 Write to factory set-up is not possible.
132 No LCP access.
252 Unknown viewer.
253 Request is not supported.
254 Unknown attribute.
255 No error.
Table 7.7 Slave Report
7.4.8 Parameter Number (PNU)
Bit numbers 0–11 transfer parameter numbers. The
function of the relevant parameter is dened in the
parameter description in chapter 6 Programming.
7.4.9 Index (IND)
The index is used with the parameter number to read/
write access parameters with an index, for example,
parameter 15-30 Alarm Log: Error Code. The index consists
of 2 bytes: a low byte and a high byte.
Only the low byte is used as an index.
7.4.10 Parameter Value (PWE)
The parameter value block consists of 2 words (4 bytes),
and the value depends on the dened command (AK). The
master prompts for a parameter value when the PWE block
contains no value. To change a parameter value (write),
write the new value in the PWE block and send from the
master to the slave.
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