VLT
®
Series 3500
91
Bit 15, TIMERS OK/OVERSHOOT:
Bit 15 = “0” means that the timers for thermal motor protec-
tion and thermal drive protection have not exceeded 100%.
Bit 15 = “1” means that one of the timers has exceeded
100%.
Address
Control/status word
Data value
Check-sum
Check-sum: bytes 2-19 = 1007, reduced to 07.
Parameter no.
Example:
The status word below says that the motor is running on
the desired speed reference, but outside the defined fre-
quency area. Consequently, bit 10 = “0” (out of frequency
range) and bit 07 = “1” (warning). Voltage, current and tim-
ers are OK.
Message Example:
A drive, with address 1, is to be given a start signal and a
speed reference that corresponds to 40 Hz.
A start signal is given by means of the control word and the
speed reference is given to parameter 516, bus reference,
80% corresponding to 40 Hz, since the maximum frequency
is 50 Hz. This results in the following message:
Message from the master (PC or PLC) to the frequency converter
Function
Byte Number
ASCII Character
Decimal Value
Start-byte
1
<
60
2
0
48
3
1
49
Control character
4
U
85
5
O
79
6
G
71
7
D
68
8
@
64
9
0
48
10
5
53
11
1
49
12
6
54
Sign
13
+
43
14
0
48
15
0
48
16
0
48
17
8
56
18
0
48
Decimal point
19
0
48
20
0
48
21
7
55
Stop-byte
22
>
62
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
0/1
0
0
0
0
1
0
1
1
1
0
0
0
0
1
1
1
ASCII
@
K
H
G
