94
A19: For RS-232, RS-422, RS-485 communication, the protocol is Modbus RTU. For Ethernet
communication, the protocol is TCP/IP.
Q20: How many recorders can be connected in a network?
A20: It depends on hardware interface selected. If it is Ethernet communication, maximum,
255 devices can be connected in the network, each device in unique IP address. If it is
RS 485 communication, 247 units can be connected in the network then.
Q21: How many recorders can be viewed in the Real-time Viewer of PC software Observer II?
A21: Maximum 1024 tags can be viewed from the Real-time Viewer. These tags cover AI,
Math, DI, DO, Counter and Totalizer, excluding AO. If each recorder is used with 6 tags
in average, then the Real-time Viewer can view maximum 170 units of recorders.
Q22: Once the user forgot the password, is there a common password? If not, how to reset
recorder to the factory settings?
A22: There is no common password for this purpose. It needs to do RESET procedure to
recall the factory settings. Press and hold the top left key before turn on the power. Do
not release it until you hear two "BI " sounds. Turn the power off and on again. All
factory settings will be restored. Please note that, after this procedure, all project
configuration data will erase. You have to configure the recorder like the beginning once
again.
Q23: To change the analog input, what is the next step after changing the dip switches and
jumpers on the analog input card?
A23: It needs to press the icon of Observer software to receive configuration about modified
input from the recorder to PC first. Modify the configuration if necessary, and then send
the new configuration back to the recorder.
Q24: Which type of Ethernet cable should be used to connect with the recorder?
A24: Straight through cable should be used for the real network connection between HUB and
recorder. A cross through cable should be used for the non-real network connection, only
between PC and recorder.
Q25: How many days the data can be stored in CF card?
A25: It depends on the number of channels, the log speed of channels, and the memory of CF
card. If the recorder is used with 6-channel inputs, an easy chart to show the maximum days CF
can store the data.
CF card
128MB 512MB
1GB
Log speed
1 second
120 days
480 days 960 days
Summary of Contents for WH18/06
Page 1: ...User Manual Paperless Recorder WH18 06 15th Edition 03 2008 ...
Page 17: ...17 Figure 2 6 Figure 2 7 Figure 2 8 ...
Page 19: ...19 Figure 2 10 Figure 2 11 ...
Page 25: ...25 Digital input card DI181 Figure 2 21 Analog output card AO183I AO183V Figure 2 22 ...
Page 27: ...27 Figure 2 25 Figure 2 26 ...
Page 70: ...70 Make sure that RS 232 communication setting at the recorder and PC are equal ...
Page 87: ...87 7 Trouble shooting ...
Page 88: ...88 ...
Page 89: ...89 ...
Page 90: ...90 ...