Baumer N 142 - Manual (Page 14)

N 142
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4.2.8. Align current value with preset, command „Z“ (5Ah)
The Z command is for setting the current value to any optional position. The required position value is
transmitted to the SPA. The SPA will calculate a so-called “preset offset” -value relating to the true absolute
sensor position. When calculating the preset offset any programmed offset transmitted by command “U” will be
considered, so that after having accomplished the “Z” command the current value always equals the preset.
Note: For technical reasons there is no preset offset scaling what might result in misalignments due to rounding
operations. In this case, the current value displayed is by 1 LSB inferior or superior to the programmed preset
value.
The current value displayed is composed as follows:
Current value
Anz
= current value
Abs
+ Preset offset + Offset
Current value
Anz
current value display and readout by interface
Current value
Abs
internal absolute current value.
Preset offset Offset generated by command „Z“.
Offset Additional offset defined by command „U“. This function however must be enabled in
command bit parameter ‚a’ (61h), otherwise offset = 0.
Example 1: Readout the currently active preset
SOH Adr Cmd EOT CRC
Transmission
01h 20h 5Ah 04h 38h
SOH Adr Cmd Preset = 2,50 EOT CRC
Response
01h 20h 5Ah 30h 30h 30h 32h 35h 30h 04h 27h
Example 2: Align actual value with preset (preset = 17,25)
SOH Adr Cmd Preset = 17,25 EOT CRC
Transmission
01h 20h 5Ah 30h 30h 31h 37h 32h 35h 04h 09h
SOH Adr Cmd Preset = 17,25 EOT CRC
Response
01h 20h 5Ah 30h 30h 31h 37h 32h 35h 04h 09h
Example 3: Align actual value to preset by broadcast at all SPA´s
SOH Adr Cmd Preset = 17,25 EOT CRC
Transmission
01h 83h 5Ah 30h 30h 31h 37h 32h 35h 04h AAh
Response Not confirmed
4.2.9. Readout any optional number sequence in the upper line of display,
command „t“ (74h)
This command is for indicating a 6-digit number sequence in the upper line of the display. The sequence is
indicated without dot respectively comma. Preceding zeroes as well as both direction arrows are suppressed.
The bottom display line still indicates the current value.
The number is displayed until any command except „t“, „u“ or „R“ is received by interface. The number will be
retained after power failure.
Example: (number sequence = 654321)
SOH Adr Cmd Number sequence = 654321 EOT CRC
Transmission
01h 20h 74h 36h 35h 34h 33h 32h 31h 04h 47h
SOH Adr Cmd Number sequence = 654321 EOT CRC
Response
01h 20h 74h 36h 35h 34h 33h 32h 31h 04h 47h