Table 34: Prm_Cmd_Ack/ Red_Status
Remark
Bit
Byte
0
1
2
3
4
5
6
7
Header (0x08)
0
0
0
1
0
0
0
0
1
Status_Type
0x9E = Prm_Cmd_Ack
0x9F = Red_Status
2
Slot
0
0
0
0
0
0
0
0
3
Specifier
Reserved
Sequence number
4
Function
Res
Primary Re-
quest
Stop
MSAC1S
Start
MSAC1S
Check Prop-
erties
Res
Master State
Clear
Res
5
Red_State_1
(Primary status)
Backup
Primary
Hardware
defective
Data Ex-
change
Master State
Clear
Baud rate
found
Output Hold
Time started
Res
6
Red_State_2
(Backup status)
Backup
Primary
Hardware
defective
Data Ex-
change
Master State
Clear
Baud rate
found
Output Hold
Time started
Res
7
Red_State_3
Not used
8
4.5.2.
Profibus DP-V2 time-synchronisation with time stamp
Certain events within the actuator can be marked with a time stamp. The event is
sent to the master using an alarm signal; the master then reads the event with time
stamp from the actuator.
Figure 5: Time synchronisation
To ensure that all events within an installation are recorded in the correct sequence,
all Profibus DP-V2 field devices must have the same time information. For this
purpose, the master cyclically sends the current time to all field devices.
Basic procedure during communication startup
1.
During communication startup, a parameter telegram is sent from the master
to the actuator. The parameter telegram contains parameters for configuring
the time stamp and time synchronisation.
2.
The master then cyclically sends Time_Event and Clock_Value telegrams to
synchronise the time.
48
Actuator controls
Description of the data interface
AC(V) 01.2/AC(V)ExC 01.2 Profibus DP
Содержание AC(V) 01.2
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