Block Specifications
2-2
FC 56
J31069-D0155-U001-A0-7618
Calculating MOBY data throughput
The formulas in the MOBY configuration manual (chapter 3) can be used to calcu-
late data throughput with the FC 56.
Configuration manuals are currently available MOBY I (6GT2 097-4BA00-0EA2)
and MOBY U (6GT2 597-4BA00-0EA2).
Applicable in general:
t
k
Communication time between ASM, SLG and MDS
n
Amount of user data
k
Constants (see table in configuration manual)
t
Byte
Transmission time for 1 byte
(see table in configuration manual)
Attention
Use the characteristic values for filehandler mode in the formula for data
throughput.
Transmission of the data to the MDS and transmission of the data between ASM
and FC 56 take place in parallel. Usually no further time must be added for data
transmission between ASM and FC 56 so that the time
t
k
calculated above
represents the total duration of the command.
However, commands may require more time under the following conditions.
S
A very large number of MOBY channels are processed in parallel.
S
Very few (or only one) system resources are available for non-cyclic telegrams.
S
Slow transmission speeds are used on PROFIBUS.
S
Other applications are running on the S7 which require the non-cyclic telegram
services (SFC 58/59) of the SIMATIC very frequently.
t
k
+
k
Ă
)
Ă
t
Byte
Ă
n
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 ...