Peek 2070L Operating Manual - Quality Traffic Systems
Section 6 — Theory of OperationDefinitions are as follows:E '1’ - Enable input tracking functions for this output'0' - Disable input tracking functions for this outputI '1' - The output is OFF when input is ON, ON when input OFF'0' - The output is ON when input is ON, OFF when input is OFFV '1' - The max. number of 8 configurable outputs has beenexceeded'0' - No errorNumber of Items - The number of entries in the frame. If zero, alloutputs currently configured for input tracking shall be disabled.(TEES-2002: Section 22.214.171.124.2)The timestamp value shall be sampled prior to the response frame.(TEES-2002: Section 126.96.36.199.3)Outputs which track inputs shall be updated no less than once per ms.Input to output signal propagation delay shall not exceed 2 ms.(TEES-2002: Section 188.8.131.52.4)The “Number of Item” field is valid from 0 to 16 (most that is sent atone time is 8 enables and 8 disables). If processing a commandresulting in more than 8 Input Tracking functions being enabled, noneof the command shall be implemented and response message “V” bitset to 1. If an invalid output or input number is specified for a function,the FIOM software shall not do that function definition. It shall also notbe counted toward the maximum of 8 input tracking function allowed.The rest of the message shall be processed. When an Input Trackingfunction is disabled, the output is set according to the most recentlyreceived Set Outputs Command. When an input tracking function foran output is superseded (redefined as either another input trackingfunction, or as a complex output function) nothing shall be done withthe output. The most recent value remains until the new functionchanges it.(TEES-2002: Section 184.108.40.206 - Configure Complex Output Functions)CONFIGURE COMPLEX OUTPUT FUNCTIONS - The ConfigureComplex Output Functions frame shall be used to specify a complexoutput for one to eight of any of the outputs. If a Configure ComplexOutput Function command results in more than eight outputs beingconfigured, the 'V' bit in the response message shall be set to a '1', andthe command shall not be implemented. Two output forms shall beprovided, single pulse and continuous oscillation. These output formsshall be configurable to begin immediately or on a specified inputtrigger and, in the case of continuous oscillation, to continue until54 • Model 2070L Operating Manual
Detailed Systems Descriptionotherwise configured or to oscillate only while gated active by aspecified input. If the command gate bit is active, the command triggerbit shall be ignored and the specified input shall be used as a gatesignal. The command and response frames are as follows:(TEES-2002: Section 220.127.116.11.1)The bit fields of the command frame are defined as follows:E '1' - enable complex output function for this output'0' - disable complex output function for this outputJ '1' - During the primary duration, the output shall be written as alogic '1'. During the secondary duration, the output shall bewritten as a logic '0'.'0' - During the primary duration, the output shall be written as alogic '0'. During the secondary duration, the output shall bewritten as a logic '1'.Output Number - 7-bit output number identifying outputsPrimary Duration - For single pulse operation, this shalldetermine the number of 'ticks' preceding the pulse. Forcontinuous oscillation, this shall determine the length of theinactive (first) portion of the cycle.Secondary Duration - For single pulse operation, this shalldetermine the number of 'ticks' the pulse is active.Subsequent to the secondary duration, the output shallreturn to the state set according to the most recentlyreceived Set Outputs command. For continuous oscillation,Model 2070L Operating Manual • 55
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Section 1 — GlossaryEIA-232 .....