Page 64
Hach Network Interface Card for the CL17 Chlorine Analyzer
54400_network.fm
Appendix B
Note: In the following commands,
n signifies the channel number.
[n]3.00,<CR><LF><NULL>
Additional diagnostic strings will be present if service diagnostics is enabled.
These diagnostics are for service personnel only.
Manually Polling Data
Note: Refer to the Signal
Input/Output (SIO) Manual for
additional information on
communicating with the SIO.
Data is normally sent out (polled) every 2½ minutes. The automatic polling
function cannot be modified but the system can be manually polled as follows:
Enter the following to enable manual polling mode:
nRMR1
Enter the following to receive the latest reading:
nRMR?
To return to automatic polling mode enter the following:
nRMR0
Using the Signal Output Module
Refer to the Signal Output Manual (Cat. No. 51250-18) to configure up to two
relays and one 4–20 mA outputs. The relays and recorder output mirror the
outputs of the relays and recorders internal to the CL17.
Logging Data via the Hach MOD I/O Module
Measurement and alarm data from the CL17 Analyzer can be converted to
a Modbus
®
* protocol using the Hach MOD I/O Module. The data can then
be polled by any Modbus Master Device (PLC/DCS) including the Hach
OPC server/OPC data logger. Refer to the MOD I/O Module Manual for
additional information.
The CL17 Analyzer has the following setup information for the
MOD I/O Module:
* Modbus is a registered trademark of Modicon Corporation.
Number of Integer Measurements 1
Number of Floating-point Measurements 1
Number of Alarms 2
Sensor ID 8
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