8
3 Instrument description
3.1 Function 1 – Gateway
NOTE!
This function is available for software version 2.28.50 or later.
The PQM 1588 has two RS-485 interfaces for use via Ethernet.
The table below specifies the protocols and interfaces from the bus to Ethernet:
Bus
protocol
Medium
Hardware
interface on
PQM
1588
Ethernet
protocol
(TCP)
TC
port
Application
Modbus
RTU
shielded
2core
cable
RS-485 Bus 1
ModbusRTU
over TCP
8100
Higher-level PQM 1588
as data collector, device-
specific Modbus RTU
over TCP software
FRAKO
Starkstrom-
bus
®
shielded
2core
cable
RS-485 Bus 2
FRAKO TCP
protocol
8000
Higher-level PQM 1588
as data collector, device-
specific FRAKO software
Table 3-1: Description of gateway interfaces
Connection and configuration are described from pages 15 and 22 respectively.
3.2 Function 2 - Data collector
The Power Quality Manager collects and records data from the power quality management sys-
tem. Alarms are also detected, recorded and forwarded.
The data acquisition process requires system points, which can be purchased separately as and
when needed or are supplied with the instrument in the form of a licence key. The system points
upgrading package (Article No. 20-10495) is used to increase the PQM 1588 system points to the
required number in steps of 10.
When supplied with no license key, the PQM 1588 has no system points but can be used as a bus
gateway as described in section
[3.1 Funktion 1 – Gateway]
above.
The user can connect the PQM 1588 via Ethernet, with links to measuring devices via the following
Interfaces:
· Ethernet > Modbus TCP -> Modbus TCP device
· Ethernet > M-Bus converter > MBus device
· Ethernet > EMG 1500-PN > FRAKO Starkstrombus
®
· Ethernet > COM server > FRAKO RS232 adapter > EM device
· Ethernet > COM server > EMP 1100 > FRAKO Starkstrombus
®
· Ethernet > COM server > Modbus RTU
· RS-485 Bus 1 > Modbus RTU
· RS-485 Bus 2 > FRAKO Starkstrombus
®
