Spectrum Controls 140 EHC 204 00sc - Manual (Page 32)

Counter / Flow Meter Input Module
33
Bank/Data Format Select: Bits 15-16
The function of these two bits is determined by the Data Delivery Mode, Bit 14.
If the Data Delivery Mode is comprehensive, Bit 14 = 0, the bank will be displayed as shown
below:
00:
Bank 0 – channels 1 and 2
01: Bank 1 – channels 3 and 4
10: Bank 2 – channels 5 and 6
11: Bank 3 – channels 7 and 8
If the Data Delivery Mode is Speed, Bit 14 = 1, the bank will be displayed as shown below:
00:
All channels Count LSW only.
01: All channels Count MSW only.
10: All channels Rate only
11: All channels Status only.
Data Delivery Mode Select: Bit 14
This bit specifies which multiplexing mode is being used: 0 = Comprehensive or 1 = Speed
This bit directly effects the Bank/Data Format Select settings, Bits 15-16.
The Comprehensive mode reports counter LSW, MSW, Rate and Status in channel pairs (1-2, 3-
4, 5-6, 7-8) This mode is slower than the speed mode but offers all available data to the end
user.
The Speed mode reports a specific data or status value for all channels within one word. This is
a faster method of retrieving data as one may, for example, retrieve Rate values for all channels
by reading one data word.
Be aware of data synchronization problems when in the speed mode.
Note that when the Speed method is used there is no data synchronization between groups. I.e.
if count LSW is read followed by Count MSW, Count MSW data will be more recent data and
will not be synchronized with the previous Count LSW data.
Multiplexing Control: Bit 13
This bit allows the user to determine if multiplexed registers must be manually specified before
retrieval or if these registers are automatically sequencially reported.
Setting this bit to 0 activates the Manual mode.
Setting this bit to 1 activates the Autosequence mode.
Parameter Definition: Bits 10- 12
These bits determine which Parameter Value (for scale/limit word) is being prepared for pro
gramming into EEPROM. These bits are used in conjunction with the Channel Number selec
tion, Bit 6-8, to determine the scale factors for a specific channel.
The actual parameter value is defined in register 4X+1.