Hanna Instruments HI 504901 - Manual (Page 31)

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Possible causes
HI504901 not configured for commu-
nication with remote device.
Configuration parameters for serial com-
munication between HI504901 and
remote device are not correct.
Remote device is turned off.
Solutions
Run HI504901SW application software and
configure HI504901 for communication
with remote device.
Note: No PC communication session can take
place if a device is not configured in
HI504901, even if electric wiring is cor-
rectly performed between interface and
device.
Check if following parameters for serial com-
munication set with HI504901SW software
(device model, baud rate, device address - only
for instruments connected to RS485 port) match
with the ones defined on connected instrument.
Turn on remote device.
SMS DELIVERY
• Can not receive alarm SMS even if an alarm is active on a
remote device connected to HI504901 interface.
Possible causes
HI504901 not configured for commu-
nication with remote device.
HI504901 not configured for sending
SMS upon an alarm active on device.
Destination telephone number stored on
interface is not correct or country code
missing.
SMS sending disabled through external
switch.
SIM card on HI504901 expired or credit
reached zero.
SIM card on HI504901 is not able to
make voice calls.
Solutions
Run HI504901SW application software and
configure HI504901 for communication
with remote device.
Run HI504901SW application software and
enable the specific alarm notification check-
ing the proper box on “message option”
window of selected device.
Run HI504901SW application software and
check if destination telephone number is
correct and if includes country code.
Enable SMS sending through external switch.
Recharge or substitute the SIM card.
Change the SIM card with one enabled
for voice calls.
Note: Some SIM cards can be used both for
data and voice calls. Please check the
network operator for further details.
• During remote interface configuration attempt the
HI504901SW software can not connect to the HI504901
interface.
Possible causes
Modem on PC is turned off.
SIM card on HI504901 is not able to
make data calls.
HI504901 interface is out of coverage.
HI504901 interface is busy (PC com-
munications or interface configurations,
both remote and local, are already in
place, interface is performing the polling
procedure for a not responding device,
etc.).
HI504901 is in power failure status.
HI504901 interface is turned off.
Solutions
Turn on the modem and try again.
Change the SIM card with one enabled
for data calls.
Note: Some SIM cards can be used both for
data and voice calls. Please check the
network operator for further details.
Install HI504901 interface in a place with good
network coverage.
Try to connect later.
Restore mains power supply or wait for power
supply comes back.
Turn on the HI504901 interface.
PC COMMUNICATION
• No local “PC communication session” can take place with
HI504901 interface : see case “During local interface con-
figuration attempt the HI504901SW software can not connect
to the HI504901 interface” on the “Interface configuration
troubleshooting” section.
• No remote “PC communication session” can take place with
HI504901 interface : see case “During remote interface con-
figuration attempt the HI504901SW software can not connect
to the HI504901 interface” on the “Interface configuration
troubleshooting” section.
• Can not communicate with one of the remote devices con-
nected to HI504901 interface.
Possible causes
Wiring not correctly performed. Solutions
Check if the remote device is correctly connected
to HI504901 interface.