Yokogawa DA100 - Manual (Page 68)

IM DA100-11E 7-3
Output Format
7
7.3 Measured/Computed Data Output Format (Binary
code)
The data are output in the following format by receiving TS0 + “Device Trigger (GET)” + FM1:
A1 to An: Base unit number
(fixed for 80 H in computation)
B1 to Bn: Channel number*
C1 to Cn: Alarm status (level 1/level 2)
D1 to Dn: Alarm status (level 3/level 4)
E1 to En: Measured data**
Data
length
Year Month Day Hour Minute Second
A1 B1 C1 D1 E1
An Bn Cn Dn E2
Number of output bytes
Date & time
First channel
Last channel
* For optional computation channel:
A01 to A30 (Stand alon type)
A01 to A60 (Expandable type)
** Four bytes for computed data
Data length
The number of output bytes can be determined using the following equation.
Number of output bytes (Measured data) = 6 x N + 6 (N = number of output channels)
Number of output bytes (Computed data) = 8 x N + 6 (N = number of output channels)
Alarm status (C1 to Cn/D1 to Dn)
0: No alarm 4: Lower-differential-limit alarm
1: Upper-limit alarm 5: Increasing rate-of-change limit alarm
2: Lower-limit alarm 6: Decreasing rate-of-change limit alarm
3: Upper-differential-limit alarm
Measured data (E1 to En)
7FFFH (7FFF7FFFH): Positive over-limit data
8001H (80018001H): Negative over-limit data
8002H (80028002H): Measurement range setting skips.
8004H (80048004H): Abnormal data
8005H (80058005H): No data
*Data inside the parentheses ( ) are computed data.
The number of output bytes can be determined using the following equation:
Number of output bytes = 6 x N + 6 (N = number of output channels)
Number of output bytes = 8 x N + 6 (N = number of output channels)
Alarm status format
For the alarm status, one byte indicates two levels.
1 byte
Level 2 Level 1
Upper digit byte Lower digit byte
1 byte
Level 4 Level 3
Upper digit byte Lower digit byte
The status of two levels is output in hexadecimal notation. For example, if the level 1 alarm status
is 2 (lower-limit alarm) and the level 2 alarm status is 4 (lower-differential-limit alarm), 42H is
output.
Note
• The output data are all output in hexadecimal notation.
• Measured data can be output either from the MSB (upper digit) or LSB (lower digit) according to the specification of the
output order.
Since the instrument determines upper byte and lower byte in units of 2-byte data, the 4-byte computed data are output in
the following way.
If MSB(upper byte): "ABCD"
If LSB(lower byte): "BADC"
The default of BO command is “MSB”
• Data in the channel not connected in the system settings, including channel numbers, are not output.