Siemens SIMATIC S7-300 Manual For Migrating page 29

4 Hardware Migration
Counter modules (FM 350-1/FM450-1)
Table 4-15
Function in S7-300/S7-400
Pulse encoder 24V
Input
(Counter Incremental encoder 24V
signal)
Incremental encoder 5V
Internal 1 MHz reference
Counting, measuring
Comparator
Function
Hardware gate
Time measurement
2DQ
Output
TM Count 2x24V and TM PosInput2 have the same counter functionality. They
Note
only differ in the type of input signals. TM Count 2x24V is suitable for 24V
counter signals and TM PosInput2 for the difference signals to RS422 or 5V
level. Configuration and user interface are compatible.
The function of reading an SSI absolute value encoder is of no relevance for the
replacement of FM x50.
Instead of the blocks FM_CNT_CTRL the High_Speed_Counter technology
object is used.
Migration S7-300/S7-400 nach S7-1500
Entry ID: 109478811, V1.1,
TM Count 2x24V
TM Count 2x24V
TM PosInput2
TM TimerDIDQ 16x24V
TM Count 2x24V or
TM PosInput2
TM Count 2x24V or
TM PosInput2
TM Count 2x24V or
TM PosInput2
TM Timer DIDQ 16x24V
TM Count 2x24V,
TM PosInput2
05/2017
Solution in S7-1500 Comment
200kHz input frequency
200kHz input frequency
1MHz input frequency
For measuring time
Fast responds to DQ
Fast responds to DI
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