Operating Instructions

Input/output terminals
Function diagrams
2-509
© Siemens AG 2008 - 2013 All Rights Reserved SINAMICS G120 CU230P-2 Control Units List Manual (LH9), 01/2013
Fig. 2-10 2251 – Analog inputs 0 ... 1 (AI 0 ... AI 1)
- 2251 -
Function diagram
87654321
fp_2251_97_52.vsd
Input/Output Terminals
G120 CU230P-2
12.12.2012 V4.6
Analog inputs 0 ... 1 (AI 0 ... AI 1)
3
3
20 mA
T0
<2>
0 … 20 mA
-10 … +10 V
Kl. 3
(Kl. 10)
[%]
xy
<2> <2>
A
D
+
-
<1>
<1>
x
1
y
2
x
2
y
1
y
x
[%]
y
x
2
x
1
<2> <3>
<3>
I I
1
0
20 mA
1
0
Voltage
Current
Hardware smoothing
100 µs
Scaling
Differential Input!
For an input signal referred to ground, terminal 4 (11) must be connected to reference potential M.
Caution:
The voltage between an input (Kl. 3 (Kl. 10) or Kl. 4 (Kl. 11)) and the ground point must not exceed 35 V.
When the load resistor is switched in (DIP switch in position ĹI), the voltage between the input terminals
must not exceed 10 V or the impressed current 80 mA.
For p0756 = 2, 3 the units are mA.
For p0756 = 0, 1, 4 the units are V.
Possible settings p0756[0] and p0756[1]:
= 0: 0 V ... +10 V
= 1: +2 V ... +10 V with monitoring
= 2: 0 mA ... +20 mA
= 3: 4 mA ... +20 mA with monitoring
= 4: -10 V ... +10 V (Default for AI 0 and AI 1)
F03505
"Wire
breakage"
r0752
CU AI U/I_inp act
Kl. 4
(Kl. 11)
<4>
Wire breakage sensing only activated when p0756 = 1, 3.
<5>
Kl. = Terminal
Sampling time of the AI : 4 ms
r0755
CU AI value in % [%]
[0..1]
<2>
<4>
<5>
Values in brackets --> AI 1
<2>
Type switching
Analog input
U I
U U
AI 0/1
U I
AI 0/1
CU AI status word
r0751
CU AI type
0 ... 8
p0756[0..3] (4)
CU AI sim_mode
0 ... 1
p0797[0..3] (0)
CU WireBrkThresh
0.00 ... 20.00
p0761[0..3] (2.00)
CU wire brk t_del
0 ... 1000 [ms]
p0762[0..3] (100)
CU AI sim_mode
0 ... 1
p0797[0..3] (0)
CU AI sim setp
-50.000 ... 2000.000
p0798[0..3] (0.000)
CU AI char y1
-1000.00 ... 1000.00 [%]
p0758[0..3] (0.00)
CU AI char y2
-1000.00 ... 1000.00 [%]
p0760[0..3] (100.00)
CU AI char x1
-50.000 ... 160.000
p0757[0..3] (0.000)
CU AI char x2
-50.000 ... 160.000
p0759[0..3] (10.000)
CU AI T_smooth
0.0 ... 1000.0 [ms]
p0753[0..3] (0.0)
100 %
xx
21
x
Reference
quantities
p2000 … r2004