Siemens SIMATIC TeleControl DNP3 User Manual

Configuration
3.12 Communication with the CPU
Configuration - DNP3
64 Configuration Manual, 11/2018, C79000-G8976-C508-01
PLC tags for partner status / path status
Via the PLC tag that can be configured here, you can monitor the following information about
the reachability of the communications partners:
●
Partner status
Reachability of the remote communications partner
●
Path status
Status of the connection path or the redundant connection paths to the remote
communications partner
For information on communication and the possible connection paths, see section
Communications options (Page 26).
For every configured communications partner to which a single or redundant telecontrol
connection is created, you can create a PLC tag of the type Word.
Assignment of the PLC tags for partner status / path status
In the two bytes of the PLC tag of the data type Word (DB, memory bit, output) the following
information is output:
●
Byte 0: Partner status
●
Byte 1: Path status
Byte 0 "Partner status"
Byte 0 codes information on the reachability of the communications partner, on the existing
connections and connection paths and on the status of the send buffer of the TIM.
Table 3- 1 Assignment of byte 0: Meaning of the bit statuses
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Path redun-
dancy
Connection
mode
Temporary
connection *
(Re-
served)
Frame memory **
Path status
Partner status
0: No redun-
dancy
1: Redundancy
exists
0: Permanent
1: Temporary
0: Partner not
reachable
1: Partner
reachable
*
- 0: Send buffer OK
1: Memory occupation
> 80 %
3: Overflow (memory
allocation 100 %)
0: Not all paths
reachable
1: All paths
reachable
0: Partner not
reachable
1: Partner
reachable
**
Partners that support temporary connections are set to "accessible" if the partner itself terminates the connection and
there is no connection established.
** Status of the send buffer:
If Bit 2 or Bit 2+3 is set on a send buffer overflow or prewarning, the two bits are only reset
when the memory occupation falls below 50%.
For information on the send buffer, see section Process image, type of transmission, event
classes (Page 113).

Siemens SIMATIC TeleControl DNP3 Specifications

General

Brand	Siemens
Model	SIMATIC TeleControl DNP3
Category	Control Unit
Language	English