Lenze EPM−T9XX Modular system - Manual (Page 424)

Parameterising analog modules
Signal functions 4xanalog input ±20mA
13
Parameter setting via PROFIBUS−DP
13.1
13.1.6
L
13.1−12 EDSPM−TXXX−9.0−11/2009
13.1.6 Signal functions 4xanalog input ±20mA
)
Note!
l Short−circuit unused inputs (connect positive and negative
terminals) or deactivate them by assigning the function number
FF
h
.
l In the event of an overflow or underflow, wrong values are
output. Strong signal jumps with sign reversal may occur.
I/O system IP20 multiplies measured values with decimal positions and without
normalisation by a factor and transfers them as integers to the bus. To output the
decimal positions, divide the measured values by the same factor.
Example:
Measuring task: Current measurement with signal function 2C
h
. Measured value = 15.5 mA.
1. I/O system IP20 converts the measured value into an integer:
15.5 [V] × 10 = 155
2. Reconvert the measured value to output it with decimal positions:
155 [mA]
10
+ 15.5 mA
Paramete
r bytes
2/3/4/5 Signal function Signal range Format 1) Tolerance
00
h
20 Parameter data in module are not overwritten
2C
h
Current
measurement ±20 mA −20.00
−27648 {0.01 mA}
{1
dec
}
+20.00
27648
S7
Two’s
complement
±0.1 % 2)
±0.2 % 3)
Min. Limit
values
Max.
−23.52 mA
−32512
dec
+23.52 mA
+32511
dec
2D
h
Current
measurement 4 ... 20
mA 4.00
0 {0.01 mA}
{1
dec
}
20.00
27648
S7
Two’s
complement
±0.2 % 2)
±0.5 % 3)
Min. Limit
values
Max.
1.185 mA
−4864
dec
+22.81 mA
+32511
dec
2E
h
Current
measurement 4 ... 20
mA 4.00
0 {0.01 mA}
{1
dec
}
20.00
16384
S5
Sum and sign
±0.2 % 2)
±0.5 % 3)
Min. Limit
values
Max.
0.8 mA
−3277
dec
+24.00 mA
+20480
dec
2F
h
Current
measurement ±20 mA −20.00
−16384 {0.01 mA}
{1
dec
}
+20.00
16384
S5
Sum and sign
±0.1 % 2)
±0.2 % 3)
Min. Limit
values
Max.
−25.00 mA
−20480
dec
+25.00 mA
+20480
dec