5-10
Series 90-30 PLC Installation and Hardware Manual
–
August 2002
GFK-0356Q
5
Series 90-30 CPU Capacities
The following table describes the maximum capacities and operating features for the Series 90-30
PLC CPU models. For State Logic CPUs, see “System Specifications for Series 90-30 State Logic
CPUs”
in Chapter 9.
Table 5-3. Series 90-30 CPU Capacities
CPU
Model
Speed,
(MHz)
Processor
Input
Points
Output
Points
Register
Memory
User Program
Memory
(Maximum)
Floating
Point
Math
CPU311
10
80188
160
1
160
1
1K (Bytes)
6K (Bytes)
no
CPU313
10
80188
160
1
160
1
2K (Bytes)
12K (Bytes)
no
CPU323
10
80188
320
2
320
2
2K (Bytes)
12K (Bytes)
no
CPU331
10
80188
512
512
4K (Bytes)
16K (Bytes)
no
CPU340
20
80C188XL
512
512
19.9K (Bytes)
32K (Bytes)
no
CPU341
20
80C188XL
512
512
19.9K (Bytes)
80K (Bytes)
no
CPU350
25
80386EX
2048
2048
19.9K (Bytes)
32K (Bytes)
yes
CPU351
25
80386EX
2048
2048
Note 3
Note 4
yes
CPU352
25
80386EX
2048
2048
Note 3
Note 4
yes
5
CPU360
25
80386EX
2048
2048
Note 3
Note 4
yes
CPU363
25
80386EX
2048
2048
Note 3
Note 4
yes
CPU364
25
80386EX
2048
2048
Note 3
Note 4
yes
CPU374
133
586
2048
2048
Note 3
Note 4
yes
5
1
Maximum of 160 combined I + O points.
2
Maximum of 320 combined I + O points.
3 Configurable from 128 to 32,640 words, in 128 word increments.
4 Depends on assigned values for configurable word memory (%R, %AQ, %AI). Maximum is 240K Bytes.
5 CPU352 and CPU374 have hardware-based floating point math. Other CPUs have firmware-based floating point math.
User Memory Addresses (References)
Data in the Series 90-30 PLC programs is referenced by its memory address. A reference indicates
the way that data is stored in the PLC. A reference specifies both a memory type and a precise
location (number) within that memory type. For example:
%I00001
specifies address 1 in input memory.
%R00256
specifies address 256 in register memory.
Difference Between a Memory Address and a Nickname
The % symbol is used to distinguish memory addresses from nicknames. For example, %I17 (or
%I000017) is a memory address. The similar term, I17 (it has no % sign), is viewed by the PLC as
a nickname and could be used with most memory addresses. For example, if you had a motor in
your plant called “Infeed No. 17,” and it was commonly referred to as ”I17” by the people in your
plant, you might wish to use I17 as the nickname for the output coil (%Q11) that turns on that
motor. You are allowed to do so because the PLC can distinguish between the nickname, I17 (your
nickname for memory address %Q11), and memory address %I17.