38/128 Product information
Bosch Rexroth AG, CytroBox, RE 51057-B/11.19
5.3.6 Degassing and drainage
The degassing and drainage function is deactivated on delivery. Due to complex
interactions with the complete hydraulic system, these functions can only be
activated and parameterized in cooperation with BoschRexroth.
Degassing and drainage of oil is provided. For this purpose, the air and water
concentration in the oil is evaluated and, if threshold values are exceeded,
adegassing valve and a drain valve are controlled. The functions can be activated as
follows:
Table 31: Activation/deactivation of the function
Parameter/Bit State Description
P-0-1380 Bit 0
FALSE Degassing deactivated
TRUE Degassing activated
P-0-1380 Bit 1
FALSE Drainage deactivated
TRUE Drainage activated
If the measured value of the air concentration (P-0-1270) is above the threshold
value (P-0-1389[2]) for a debouncing time (P-0-1389[9]), the degassing valve
(P-0-1418 bit 0) is controlled until the degassing time (P-0-1389[11]) has expired.
After successful degassing, a restart lockout occurs for a pause time (P-0-1389 [10]).
Table 32: Overview of "Degassing" parameters
Parameter Description Unit Default
P-0-1270 Actual value mbar -
P-0-1389[9] Debouncing time ms 0
P-0-1389[2] Threshold value mbar 160
P-0-1389[11] Degassing time sec 30
P-0-1389[10] Pause time sec 300
Drainage is only active when degassing is not requested.
If the measured value of the relative oil humidity (P-0-1272) is above the threshold
value (P-0-1389[12]) for a debouncing time (P-0-1389[15]), the degassing
valve (P-0-1418 bit 0) and the drain valve (P-0-1418 bit 1) are controlled until the
drain time (P-0-1389[17]) has expired.
After drainage, degassing is automatically carried out. The degassing valve
(P-0-1418 bit 0) is still controlled until the "degassing time after drainage"
(P-0-1389[22]) has expired.
After successful degassing, a restart lockout occurs for a pause time (P-0-1389 [16]).
Activation/deactivation
of the function
Degassing
Drainage
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