Programming MOBY-ASM on PROFIBUS-DP-V1
B-7
FC 56
J31069-D0155-U001-A0-7618
B.2
Working with the ASM
Command processing is handled command by command.
This means that, after each command, the user must wait for the acknowledgment
(result) before the next command is sent to the ASM. This type of programming
involves the following characteristics.
S
Simple programming of a function block
S
No optimal-speed data transmission for several consecutive commands
The following diagram shows the procedure used for command and
acknowledgment communication between user (DP master) and MOBY-ASM.
The command and acknowledgment telegram is a non-cyclic DP/V1 telegram with DP/V1 response.
Start is only permitted after a change in the command and/or acknowledgment counter.
Change in the command counter. New state = old state + 1 (cyclic word)
Change in the acknowledgment counter. New state = old state + 1 (cyclic word)
No change in the cyclic data
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ÉÉ
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DP master
MOBY-ASM
Command
Acknowledgment
Processing a MOBY command
Time axis
Direction of
communiĆ
cation
Processing the
1st command
Communication
with the MDS
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ÉÉ
ÉÉ
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Command
Acknowledgment
Processing the
2nd command
Communication
with the MDS
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Figure B-5
Command processing: command by command
Command chaining and command repetition
These features are currently not supported in filehandler mode.
Summary of Contents for MOBY FC 56
Page 12: ...Introduction 1 6 FC 56 J31069 D0155 U001 A0 7618 ...
Page 63: ...5 1 FC 56 J31069 D0155 U001 A0 7618 Sample Applications 5 ...
Page 80: ...Sample Applications 5 18 FC 56 J31069 D0155 U001 A0 7618 ...
Page 90: ...Entry Exit Check of an MDS in an SLG Field 6 10 FC 56 J31069 D0155 U001 A0 7618 ...
Page 94: ...System Configuration 7 4 FC 56 J31069 D0155 U001 A0 7618 ...
Page 100: ...Commissioning Guidelines 8 6 FC 56 J31069 D0155 U001 A0 7618 ...
Page 101: ...9 1 FC 56 J31069 D0155 U001 A0 7618 Error Messages and Trouble Shooting 9 ...
Page 152: ...Programming MOBY ASM on PROFIBUS DP V1 B 30 FC 56 J31069 D0155 U001 A0 7618 ...