Wieland samos PRO Manual page 12

Term
SP-COP2-ENI
PLC
Stuck-at high
Stuck-at low
T→O
TCP
Test pulses or scan gaps
Test pulse error
TX
UCMM
UDINT
UDP
UDT
UINT
USINT
Wieland Electric GmbH | BA000970 | 07/2019 [9855]
Explanation
Controller module, which is equipped with safety inputs and outputs
and gateway functions, amongst other things
Programmable Logic Controller
( PLC)
Stuck-at high is an error in which the input or output signal gets stuck at
On. The causes for a Stuck-at high can be short-circuits to other input
and output lines, often called cross-references, or defective switching
elements. Stuck-at high errors are discovered through plausibility tests,
such as sequence errors in two-channel input circuits or using test pul-
ses in input and output circuits.
Stuck-at low is an error in which the input or output signal gets stuck at
Off. The causes of a stuck-at low can be line interruptions in input cir-
cuits or defect switching elements. Stuck-at low errors are discovered
through plausibility tests and usually do not require immediate error
recognition.
Target to Originator
Transmission Control Protocol, Internet standard protocol for the
transport layer specified in RFC 793
Test pulses or scan gaps are brief switch-offs / interruptions in input
and output circuits, which are generated in a targeted manner to detect
stuck-at high errors quickly. Test pulses check the switch-off ability of
switching elements during operation on an almost continuous basis.
Test pulse errors are undetected test pulses, which lead to a negative
test result and thus switch-off of the affected safety circuits.
Transmit / Send
Unconnected Message Manager
Unsigned double integer = 4 Bytes = 2 Words
Data type specified for CIP applications
User Datagram Protocol, Internet standard protocol for the transport
layer specified in RFC 793
User Defined Type
Unsigned double integer = 2 Bytes = 1 Word
Data type specified for CIP applications
Data type specified for CIP applications, which stands for 1 byte without
a plus/minus symbol
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