Hach si792 D series, User Manual

Page: 48 / 96

Operation—Foundation Fieldbus
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6.2 Foundation Fieldbus communication
Use the Foundation Fieldbus specification to set up and configure the
si792 transmitter. The communication parameters are listed in the
following sections. The sensor can be calibrated as described in
section 6.2.4 on page 63
.
6.2.1 Standard resource block (RB)
The standard resource block describes the transmitter characteristics
(manufacturer, device name, operating status, global status). The
resource block must be in automatic mode for any of the other blocks to
operate. The bus parameters for the standard resource block (RB) are
shown in
Table 14
.
Table 14 Bus parameters—resource block (RB)
Parameter Description Default R/W
ST_REV Static revision 0 R
TAG_DESC TAG description ‘ R/W
STRATEGY Strategy 0 R/W
ALERT_KEY Alert key 0 R/W
MODE_BLK
Target OOS
(out of service)
R/W
Actual —
Permitted OOS, Auto
Normal Auto
BLOCK_ERR Block error R
RS_STATE Resource state 1 R
TEST_RW Test R/W
DD_RESOURCE DD resource ‘ R
MANUFAC_ID Manufacturer ID 0x001D6D for Hach R
DEV_TYPE Device type 0x0064 R
DEV_REV Device revision 1 R
DD_REV DD revision 1 R