Front Leds - Siemens SMP16-SFT251 Technical Description

SMP16-SFT251
ZS0n ZS0n
ZS1n
ZS1n
ZS2n ZS2n
ZS3n ZS3n
A
A track CNT
B track B
U/D*
N track
Overflow
Counter controller
Hardware support,
ZS3n
counter oper. modes,
CR1n
edge evaluation,
clear control,
load control,
and so on
The figure shows only one counting channel.
The diagram for the second channel is identical.
For the sake of clarity, only the most important signals
and buses are included.
The letter "n" following some of the signals stands
for the channel number: n=0 for channel 0 and n=1 for channel 1.
Figure 2.1 Block circuit diagram of the SMP16-SFT251
2.2

Front LEDs

The two front LEDs (L1 and L2) show the direction of rotation of the shaft encoder for channel 0 or
channel 1 during position acquisition.
These LEDs are irrelevant for "frequency and pulse width measurement" mode.
X3
L1 L2
X4
©Siemens AG 2003, All Rights Reserved
(4)J31069-D2090-U001-A1-7618
Universal register controller
Universal
32 bit
register 0
counter
16:31
CBn
Status register 0 - 2
Controller register 0 - 2
Channel 0:
Direction of Rotation
Up
Down
Channel 1:
Direction of Rotation
Up
Down
32
Universal Universal
register 1 register 2
16:31 0:15
I/O data bus(0:15)
CS signals
Address decoding
Command
(for channels 0 and 1)
signals
Generation of the CS signals
and the read/write commands
Address bus
for the individual registers,
(0:5)
generation of the
command signals
CR1n
Overflow CBn
Status - LED L1
On
Off
Status - LED L2
On
Off
CR1n
Comparator 1
Data bus
(0:15)
Bus interface
Command
(ASBIC)
signals
(for counting channels
Address bus
0 and 1)
(0:19)
ZS0n
Interrupt
ZS1n
IRQ 0..5
controller
ZS2n
ZS3n
(
for channels 0 and 1)
Features
11