Installation and Operations Guide
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ACM-VLX/VLX/EXP/AXM
70
© Honeywell. All Rights Reserved. LT-VLXEXPAXMIOG Rev. 01
Table 17 Te st de s criptions and corres ponding diagnos tic LED patte rns
Te s ts Des c riptio n
LED patte rns
CPU SYS ROC DDC
1
SRAM data bus tes t Isolates shorted or
ope n line s on the VLX/VLX-Platinum S RAM
data bus . The tes t writes a s e rie s of data
value s, e ach with a s ingle bit s e t, to diffe re nt
SRAM locations.
ON OFF OFF OFF
2 SRAM addre s s bus tes t Isolate s s horte d or
ope n addre s s line s on the VLX/VLX-Platinum
SRAM addres s bus .
OFF ON OFF OFF
3 SRAM data c ell te s t Ve rifie s that e ach
SRAM ce ll is functional. Each ce ll is writte n to
and the n value s are ve rifie d with two te s t
patte rns .
ON ON OFF OFF
4 EEPROM S PI inte rfac e te s t Ve rifie s that
VLX/VLX-Platinum EEPROM is pre s e nt and
responds corre ctly to VLX/VLX-Platinum
requests to re ad and write data.
OFF OFF ON OFF
5 EEPROM data re tentio n te s t Verifie s
inte grity of EEPROM data cells. Re ads curre nt
EEPROM data, write s data to e ach ce ll, reads
data back, and the n re s tore s original data.
ON OFF ON OFF
6 Re al-time clock tes t Ve rifie s that the re al-
time clock compone nt is present, re s ponds
correctly to VLX/VLX-Platinum commands, and
keeps accurate time.
OFF ON ON OFF
7 DUART inte rfac e tes t Ve rifie s that the se rial
DUART us e d for MS TP and EXP/AXM
communications is pres e nt and re s ponds
correctly to VLX/VLX-Platinum commands.
The te s t ve rifie s that the DUART re gis ters hold
writte n value s .
ON ON ON OFF
8 MSTP c o mm. channe l te s t Ve rifie s that the
onboard MS TP channe l is ope rational.
OFF OFF OFF ON
9 EXP c o mm. channe l te s t Ve rifie s that the
onboard EXP/AXM communications channel is
operational.
ON OFF OFF ON
10 PTP c omm. c hannel te s t Ve rifie s that the
se rial communications controlle r is ope rational.
OFF ON OFF ON
All te s ts comple te --OK Flash ON the n OFF.
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