YASKAWA VIPA System SLIO Manual page 319

VIPA System SLIO
3.27.7.1 Structure
Telegram
Byte Function
B0 B0: Header byte 0
Bit 3 ... 0:
n
n Bit 6 ... 4: Telegram type
n Bit 7: 0 fix reserved
B1 B1: Header byte 1
n ID of the measurand (1 ... 41)
–
B2 B2: Header byte 2
n Bit 3 ... 0: Data set ID (DS-ID) of the measured value (1 ... 15)
n Bit 7 ... 4: Length of the user data (1 ... 12)
B3 B3: Header byte 3 - Common status
n Bit 0: Frequency F_MAX exceeded
n Bit 1: Frequency F_MIN undershot
Bit 2: Temperature T_MAX exceeded
n
Bit 3: Voltage VRMS_MAX exceeded
n
n Bit 4: Voltage VRMS_MIN undershot
n Bit 5: Efficiency PF_MIN undershot
n Bit 6: Current IRMS_MAX exceeded
n Bit 7: reserved
D00 D00 ... D11: User data:
User data for data to be sent and received
n
...
D11
Status communication
HB300 | SM-AIO | | en | 17-05
The communication takes place via the I/O area of the head module. The head module
sends via the output area a request telegram to the module. This responds with the
requested data within the input area of the head module. Depending on the used head
module this may take several cycles to complete, until the data are received in the input
area. To ensure the consistency of all measured values, which originate from the same
measurement, are stored in the module under one
output data the telegram has a length of 16byte and the following structure:
Ä 'Status communication' on page 319
Each measurand one ID is assigned. The access to the measured value of a measurand hap-
pens by means of the corresponding ID
Via the header byte (bit 3 ... 0) the status of the communication can be determined. On
error no user data are transferred i.e. the length of the user data is 0. Please note that
low error IDs are overridden by higher error IDs.
Status
0x00
0x01
0x02
0x03
0x04
031-1PA00 - AI1x 3Ph 230/400V 1A > Process data communication
Ä Chapter 3.27.6 'Measurands' on page 316
Designation
OK (no error)
Error: No new measured values available
Error: DS-ID
Error: Telegram length
Error: Frame too big
Analog Input
Ä 'DS-ID' on page 309. For input and
319