Siemens SIMATIC S5-115U, Руководство пользователя

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Addressing/Address Assignments S5-115U Manual
6.2.1 Fixed Slot Address Assignments
Input/output modules are referenced under permanently assigned slot addresses when the
following conditions exist for the S5-115U:
• The PLC is operated without an expansion unit interface module and a terminating resistor is
used.
• The PLC is operated with the IM 305 interface module (centralized configuration, see
Section 3.2.5).
The number of address bytes available for digital and analog modules varies.
Digital Modules
Each slot has four bytes, so that 32 binary inputs or outputs can be addressed. If you plug in digital
modules with 8 or 16 channels, use the low-order byte numbers for addressing. In this case, the
high-order byte numbers are irrelevant.
Analog Modules
For fixed slot addressing, analog modules can be plugged into slots 0 to 3 of a central controller
only.
Each slot has 32 bytes. You can thus address 16 analog channels. If you plug in 8-channel modules,
use the 16 low-order byte numbers for addressing. In this case, the 16 high-order byte numbers
are irrelevant.
Note the following:
• Input and output modules cannot have the same address.
• If an analog module has been assigned an address for a particular slot, this address cannot be
used for digital modules and vice versa.
Figures 6-2 and 6-3 show the exact assignment of fixed addresses (please observe the "Installation
Guidelines" in Sections 3.1.1 and 3.1.2).
Figure 6-2. Fixed Slot Addressing in the Central Controllers
Slot numbers in
the central
controller
PS CPU 0 1 2 3 4 5 6 IM
24.0
.
.
27.7
20.0
.
.
23.7
16.0
.
.
19.7
12.0
.
.
15.7
8.0
.
.
11.7
4.0
.
.
7.7
0.0
.
.
3.7
128
.
.
159
160
.
.
191
192
.
.
223
224
.
.
255
Analog modules
cannot be plug-
ged into these
slots
Digital
modules
Analog
modules
Modules Addresses
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6-2
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