ProSoft Technology MVI69-101S - Manual (Page 131)

Reference MVI69-101S ♦ CompactLogix or MicroLogix Platform
IEC 60870-5-101 Slave Communication Module
ProSoft Technology, Inc. Page 131 of 149
March 16, 2009
Offset Parameter Description
24 MMENB Event
Buffer This parameter shows the number of events available in the
event buffer for M_ME_NB points
25 MMENC Event
Buffer This parameter shows the number of events available in the
event buffer for M_ME_NC points.
26 MIT Event Buffer This parameter shows the number of events available in the
event buffer for M_IT_NA points
5.8 IEC 60870-5-101 Slave Interoperability Document
This companion standard presents sets of parameters and alternatives from
which subsets have to be selected to implement particular telecontrol systems.
Certain parameter values, such as the number of octets in the COMMON
ADDRESS of ASDUs represent mutually exclusive alternatives. This means that
only one value of the defined parameters is admitted per system. Other
parameters, such as the listed set of different process information in command
and in monitor direction allow the specification of the complete set or subsets, as
appropriate for given applications. This clause summarizes the parameters of the
previous clauses to facilitate a suitable selection for a specific application. If a
system is composed of equipment originating from different manufacturers it is
necessary that all partners agree on the selected parameters.
Note: In addition, the full specification of a system may require individual selection of certain
parameters for certain parts of the system, such as the individual selection of scaling factors for
individually addressable measured values.
The selected parameters should be marked in the white boxes as follows:
Function or ASDU is not used
⌧ Function or ASDU is used as standardized (default)
A black check box indicates that the option cannot be selected in this companion
standard.
Network Configuration
(Network-specific parameter)
⌧ Point-to-point ⌧ Multipoint-party line
⌧ Multiple point-to-point ⌧ Multipoint-star
Physical Layer
(Network-specific parameter)
Transmission speed (control direction)
Unbalanced interchange Unbalanced interchange Balanced interchange
circuit V.24/V.28 circuit V.24/V.28 circuit X.24/X.27
Standard Recommended if >1 200 bit/s