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ifm
Programming Manual ecomatController/60-1 (CR711S) Operating System V2.5.0.n
2017-12-19
Glossary of Terms
>
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.
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MSB
M
ost
S
ignificant
B
it/Byte
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N
NMT
NMT =
N
etwork
M
anagemen
t
= (here: in the CANopen protocol).
The NMT master controls the operating states of the NMT slaves.
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Node
This means a participant in the network.
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Node Guarding
Node = here: network participant
Configurable cyclic monitoring of each
→slave configured accordingly. The →master verfies if the
slaves reply in time. The slaves verify if the master regularly sends requests. In this way failed network
participants can be quickly identified and reported.
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O
Obj / object
Term for data / messages which can be exchanged in the CANopen network.
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Object directory
Contains all CANopen communication parameters of a device as well as device-specific parameters
and data.
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OBV
Contains all CANopen communication parameters of a device as well as device-specific parameters
and data.
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OPC
OPC =
O
LE for
P
rocess
C
ontrol
Standardised software interface for manufacturer-independent communication in automation
technology
OPC client (e.g. device for parameter setting or programming) automatically logs on to OPC server
(e.g. automation device) when connected and communicates with it.
