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ifm
Device Manual AS-i IO-Link-Gateway (AC5225) Firmware V1.16
2017-11-20
Glossary of Terms
>
Modbus
The Modbus protocol is a communication protocol based on a
→master/slave architecture and was
generated by Modicon (since 1994: Groupe Schneider) in 1979 for communication with its PLCs. In
the industry, Modbus has become a de facto standard.
Modbus/TCP is based on
→Ethernet TCP/IP. Modbus/TCP ports the protocol defined for the serial
interface to TCP. The
→IP address clearly identifies each device in a network. Therefore the slave
address was used to identify one of several logical units (unit IDs) in a physical device. To do so, the
extended IP addressing is used.
Example: 192.168.83.28.1 means unit ID 1 on IP address 192.168.83.28.
>
MRAM
MRAM =
M
agnetoresistive
R
andom
A
ccess
M
emory
The information is stored by means of magnetic storage elements. The property of certain materials is
used to change their electrical resistance when exposed to magnetic fields.
Advantages of MRAM as compared to conventional RAM memories:
• non volatile (like FRAM), but:
• access time only approx. 35 ns,
• unlimited number of access cycles possible.
>
MSB
M
ost
S
ignificant
B
it/Byte
>
O
OSC
OSC =
O
nline
S
upport
C
enter
→
Online Support Center (OSC)
Help system in the device
>
OSSD
OSSD =
O
utput
S
ignal
S
witching
D
evice
= output signal of a safety switching device, e.g. SafetySwitch, AS-i safety monitor.
>
P
Password
AS-i controllerE: in the menu [System Setup], menu item [Password] the handling can be restricted or
enabled. When delivered, the device is in the user mode. By entering an invalid password (e.g. 1000)
all menu items which can change settings are blocked.
>
PCCD
PCCD =
P
rojected
C
TT
C
onfiguration
D
ata.
Configuration data for the 7.4 and 7.5 slaves stored in the device:
• manufacturer ID,
• vendor ID,
• device ID,
• device group ID.
Summary of Contents for AC5225
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