Rockwell Automation 1203-USB Converter User Manual
Page 103
Glossary
G-3
PowerFlex 1203-USB Converter User Manual
Publication DRIVES-UM001D-EN-P
DSI (Drive Serial Interface)
DSI is based on the Modbus RTU serial communication protocol and is
used by PowerFlex 4-Class drives, PowerFlex 520-Series drives, and
Kinetix 3 drives.
DSI Peripheral
A device that provides an interface between DSI and a network or user.
Peripheral devices are also referred to as ‘adapters’ and ‘modules’. The
1203-USB converter, 22-COMM-x network communication adapters, and
PowerFlex 4-Class HIMs (22-HIM-xxx) are examples of DSI peripherals.
DSI Product
A device that uses the DSI communications interface to communicate with
one or more peripheral devices. For example, a motor drive such as a
PowerFlex 4-Class drive is a DSI product. In this manual, a DSI product is
also referred to as ‘drive’ or ‘host’.
H
HIM (Human Interface Module)
A device that can be used to configure and control a PowerFlex 7-Class
drive or a PowerFlex 4-Class drive. PowerFlex-7 Class HIMs (20-HIM-xxx)
and PowerFlex 4-Class HIMs (22-HIM-xxx) can be used to configure
connected peripherals.
Hold Last
When communications are disrupted (for example, a cable is disconnected),
the converter and drive can respond by holding last state. Hold last state
results in the drive receiving the last data received via the DF1 connection
before the disruption. If the drive was running and using the Reference from
the converter, it will continue to run at the same Reference.
N
NVS (Non-Volatile Storage)
NVS is the permanent memory of a device. Devices such as the converter
and drive store parameters and other information in NVS so that they are not
lost when the device loses power. NVS is sometimes called ‘EEPROM’.
P
PCCC (Programmable Controller Communications Commands)
PCCC is the protocol used by some controllers to communicate with
devices on a network. Some software products (for example, DriveExplorer
and DriveExecutive) also use PCCC to communicate.
Ping
A message that is sent by a DPI or SCANport drive to its peripheral devices,
which use the ping to gather data about the product, including whether it can
receive messages and whether they can log in for control.