5
T 335 AS
T 336 AS
Operating instructions
Position switch with safety function
EN
6. Diagnostic
6.1 LED indications
The LED's have the following meaning (to EN 50295):
LED yellow
Channel 1 / AS-i SaW-Bit 0,1
green/red LED
(AS-i Duo LED):
AS-Interface supply voltage/
AS-Interface communication error
or slave address = 0 or periphery error
LED yellow
Channel 2 / AS-i SaW-Bit 2,3
Channel 1
Channel 2
AS-iDuoLED
6.2 Read-out of the parameter port
The parameter port P0 to P3 of an AS-i slave can be read out through
the control interface of the AS-i master (see component description) by
means of the "Write parameter" instruction (with hexadecimal value F)
This (non-safe) diagnostic information from the reflected parameters or
the answer to a "Write parameter instruction" can be used by the user
for diagnostic purposes or for the control programme
Table 3: diagnostic information (P0 … P3)
Parameter bit
Condition = 1
Condition = 0
0
Channel 2 activated
Channel 2 disabled
1
−
−
2
−
−
3
−
−
7. Set-up and maintenance
7.1 Functional testing
The safety function of the safety components must be tested The
following conditions must be previously checked and met:
1 Check the switch enclosure for damage
2 Check the free movement of the actuating element
3 Check the integrity of the cable entry and connections
7.2 Maintenance
We recommend a regular maintenance, including the following steps:
1 Check the free movement of the actuating element
2 Remove particles of dust and soiling
3 Check cable entry and connections
Damaged or defective components must be replaced.
8. Disassembly and disposal
8.1 Disassembly
The safety switchgear must be disassembled in a de-energised
condition only
8.2 Disposal
The safety switchgear must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations
