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Smb30: (Port 0) And Smb130: (Port 1); Smb34-Smb35: Time Intervals For Timed Interrupts - Siemens SIMATIC S7 System Manual

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D.12

SMB30: (Port 0) and SMB130: (Port 1)

SMB30 configures Port 0 (onboard RS485 port).
SMB130 configures Port 1 (optional CM01 signal board).
You can read and write to SMB30 and SMB130. These bytes configure the respective
communication port for Freeport operation and provide selection of either Freeport or system
protocol support.
D.13

SMB34-SMB35: Time intervals for timed interrupts

Special memory bytes 34 and 35 control the time interval of timed interrupts 0 and 1
(Page 324). You can assign time intervals in 1-ms increments from 1 ms to 255 ms. The
CPU captures the time-interval value at the time that the CPU attaches the interrupt routine
to corresponding timed interrupt event. To change the time interval, you must reattach the
timed interrupt event to the same interrupt routine or to a different interrupt routine. You can
terminate a timed interrupt event by detaching the event.
Table D- 8
SMB34-SMB35 timed interrupt intervals
S7-200 SMART
SM address
symbol name
Time_0_Intrvl
SMB34
Time_1_Intrvl
SMB35
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
Description
Timed interrupt 0: Time interval value (in 1 ms increments from 1 ms to 255 ms).
Timed interrupt 1: Time interval value (in 1 ms increments from 1 ms to 255 ms).
Special memory (SM) and system symbol names
D.12 SMB30: (Port 0) and SMB130: (Port 1)
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