INFICON HPG400 ATM to High-Vacuum Gauge - Manual (Page 31)

tina31e1 (2004-05) HPG400 v1.om
31
This interface allows operation of HPG400-SD with part numbers
353-527 and
353-528
in connection with other devices that are suited for DeviceNet operation. The
physical interface and communication firmware of HPG400-SD comply with the
DeviceNet standard (
→ [4], [6]).
Two adjustable switching functions are integrated in HPG400-SD. The corre-
sponding relay contacts are available at the sensor cable connector
(
→ 8, 18, 34).
The basic sensor and sensor electronics of all HPG400 gauges are identical.
Caution
Caution: data transmission errors
If the gauge is operated via RS232C interface and DeviceNet interface
at the same time, data transmission errors may occur.
The gauge must not be operated via RS232C interface and DeviceNet
interface at the same time.
Via this interface, the following and further data are exchanged in the standardized
DeviceNet protocol (
→ [1]):
• Pressure reading
• Pressure unit (Torr, mbar, Pa)
• Gauge adjustment
• Status and error messages
• Status of the switching functions
As the DeviceNet protocol is highly complex, the parameters and programming of
HPG400-SD are described in detail in the separate Communication Protocol
(
→ [1]).
Before the gauge is put into operation, it has to be configured for DeviceNet op-
eration. A configuration tool and the device specific EDS file (Electronic Data
Sheet) are required for this purpose. The EDS file can be downloaded via internet
(
→ [3]).
For unambiguous identification of the gauge in a DeviceNet environment, a node
address is required. The node address setting is made on the gauge or pro-
grammed via DeviceNet.
Set the node address (0 … 63
dec
) via the "ADDRESS" "MSD"
and "LSD" switches. The node address is polled by the firmware
when the gauge is switched on. If the setting deviates from the
stored value, the new value is taken over into the NVRAM. If a
setting higher than 63 is made, the previous node address set-
ting remains valid.
If the „MSD“ switch is in the "P" position, the node address is
programmable via DeviceNet (
→ [1]).
4.6 DeviceNet Interface
(HPG400-SD)
4.6.1 Description of the
Functions
4.6.2 Operating Parameters
4.6.2.1 Operating Software
4.6.2.2 Node Address Setting