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Page 41
The hexadecimal address is a two-digit hexadecimal value from 00 to FF (or 0 to 255 in decimal
notation) used to differentiate between multiple devices. The hexadecimal address is only
necessary when the unit is configured for RS-485 serial communication. See
The checksum value is a two-digit value used to conduct checksums with external devices. The
comma mark (
,
) must be included in the command string if sending a checksum value. A checksum
value is not required in a command string if checksum function is disabled — see
on page 42. However, the Terranova® 752A will always output a checksum value
regardless of checksum function state.
Command strings to modify parameters may be sent while the Terranova® 752A is on standby or
if high voltage operation is disabled. All saved changes will appear once the control unit resumes
normal operation. User may also modify parameters via the front panel while concurrently
communicating with the Terranova® 752A.
Description
Input
Output
Serial communication: RS-232/422
Checksum value: Disabled
CHANNEL 1 PUMP SIZE value: 20 L/s
*PS1:20.0
OK:20.0,NN
Serial communication: RS-485
Hexadecimal address: 05
Checksum value: 00
CHANNEL 2 PUMP SIZE value: 20 L/s
*05PS2:20.0,00 05,OK:20.0,NN
NN is the two-digit checksum value that is automatically
calculated and output by the Terranova® 752A.
NOTE
Since 1976
Table 14.
Command communication examples
