Hardy HI 3010 Filler/Dispenser Controller - Manual (Page 150)

HI-3010 Filler/Dispenser/IBC 134
Service Manual
nal output from the load cell(s)/
point(s), and digitize, interpret, com-
municate and display the results as a
weight indication.
Troubleshooting The Network Connec-
tions and Configuration with the "Ping"
Tool
Step 1. The Ping Tool is used from the root directory of the
PC. Get to the Root directory. The Root Directory is
the “C:/” Prompt.
Step 2. If you do not know how to get to the Root Direc-
tory, check you Operating System User Guide or
Manual for information on how to get to the root
directory.
Selecting the module by number for Testing
NOTE: You can only ping from the PC you cannot ping
from an instrument.
Step 1. Type PING <space>IP address of the instrument
you want to test. For Example:
C:/PING 192.168.110.99
• In our example we used the default
address for all HI 3000 Series Instruments.
The IP address you are testing will be dif-
ferent.
Step 2. Press the Enter key on the PC.
Step 3. The PING utility starts sending out 56 signals and
64 signals should return if the unit is functioning
correctly.
• If the instrument or network are config-
ured incorrectly and cables are loose or not
connected correctly, nothing prints out
after the first line. Do the following:
1. Check the Network cables and con-
nectors to be sure they are tightly fas-
tened and the correct cables for this
application.
2. Check the configuration to be sure
that the instrument is configured cor-
rectly. (See Configuration IP Address
in Chapter 6)
3. Check the Ethernet card to be sure
that is securely seated and that it is
functioning correctly.
• If the unit is configured correctly and the
Ethernet card is functioning correctly and
the cables are the correct ones for this
application and are securely fastened, 64
signals should be returned and the print
out will reflect this fact.
NOTE: NOTE: The Ping utility continues to send out sig-
nals (pings) until you exit the Ping Tool.
• Simultaneously press the <Ctrl> key and
the letter <C> key to stop the signals.
Exiting the Root Directory
Step 1. Type exit at the root directory prompt.
C:/exit
Step 2. Press the Enter key.
About Solid State Relays With Light Loads
There have been installations where solid state relays have
been used and failed to shut off a solenoid or relay when de-
energized. The actual problem comes from the internal snub-
bing network in parallel with the Silicon Controlled Rectifier
(SCR) which does the actual switching. This network pres-
ents an impedance of 30K ohms, which means with 120
volts across, it will pass 4mA of AC current.
SCR SWITCHING LOAD CIRCUIT
The SCR itself presents no leakage current. Some solid state
relay manufactures specify 20mA minimum load. This is
based on the presumption a relay or solenoid will drop out
with only 4mA through it, which is not always true. That
may not be true. When switching a light load with a solid
state relay across the line, you must look at the rated drop-
out current of the load, and if it is less than 4mA it may not
turn off. The solution is to put a loading resistor in parallel
with the light load, to be sure leakage current is sufficiently
shunted away from the coil.
FIG. 7-122 SCR SWITCHING LOAD CIRCUIT
SOLID
STATE
RELAY
HOT
NEEDED
SHUNT 15000 ohm
RELAY
COIL
NEUTRAL