Oldham WX16, User Manual

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WX16 User Manual | 47
Memory Floating Point
Notes: Returned as 15 bit 2s complement with ±5% over/under range applied. Therefore, this must be
considered when scaling values to be displayed at the ModBus master. The following equation may be
used to determine a value for display.
Display Value = MODBUS Value [ (Span Value –Zero Value) 1.1] + {Zero Value – [(Span Value – Zero Value) .05]}
32767
Type Channel First Last Read FC Write FC Notes
Channel Value 1-16 33001-16 n/a 4 n/a 15bit 2s complement
w/±5% over/under range
Analog Output
Notes: 12 bit integer for Channel Reading value = 800 counts = zero value, 4000 counts = 100% value.
Type Channel First Last Read FC Write FC Notes
Channel 1-16 31001 31016 4 n/a 12bit integer
Reading
Channel Status words contain configuration and status bits for a channel. They are as follows:
Type Channel First Last Read FC Write FC Notes
Channel Status 1-16 31017 31032 4 n/a 16bit integer
(see bit by bit definition below)
Alarm 1 Trip bit0 1 = Low 0 = High
Alarm 1 Horn Drive bit1 1 = On 0 = Off
Alarm 3 Type bit2 1 = Level 0 = Fault
Alarm 2 Horn Drive bit3 1 = On 0 = Off
Linearize bit4 1 = On 0 = Off
Alarm 3 Trip bit5 1 = Low 0 = High
Input Marker bit6 1 = Input Marker Detected 0 = Normal Mode
Channel Disable bit7 1 = Disabled 0 = Enabled
Controller Channel In Cal bit8 1 = Local Cal Mode 0 = Normal Mode
ModBus Data Type bit9 1 = 4 byte float 0 = 2 byte integer
reserved bit10 reserved reserved
reserved bit11 reserved reserved
Alarm 1 Latch bit12 1 = Latching 0 = Non latching
Alarm 2 Latch bit13 1 = Latching 0 = Non latching
Alarm 3 Latch bit14 1 = Latching 0 = Non latching
Alarm 2 Trip bit15 1 = Low 0 = High
Alarm status words are bits packed into 16 bit integer where lsb = channel 1 alarm status and msb = channel 16
alarm status.