Bytes 6-9 Control bytes (one bit per channel). A bit value of indicates that ‘0’ the channel is set to status input. A bit value of indicates the ‘1’ channel is or mode, type or ‘Not measured’ ‘Unknown range’. Response: None. SW (Software Watchdog) Where: n = 0, to disable the software watchdog n = 1 to 255, to set the software watchdog time-out (in seconds) Note: This command applies only to the Universal IMP (types 1H and 1J), and digital IMP type 2B. Function: Enables or disables the software watchdog. Once the watchdog is enabled, the watchdog output channel (channel 20 for UIMP or 32 for digital IMP) goes from a ‘0’ state to a (no alarm) state. The IMP then expects the ST command to be sent ‘1’ within every seconds. If a time-out period passes without a ST command being ‘n’ received, the output is set to a (alarm) state. (The IMP is not reset.) Disabling ‘0’ causes the output to go into the state. The RE command does not disable the ‘0’ watchdog. Note: Enabling either watchdog causes the output to go into the (no alarm) state. ‘1’ For the output to be disabled from the watchdog, both the hardware and software watchdogs need to be disabled. Response: None. COMMANDS FOR ANALOGUE OUTPUTS CH VO (CHannel VOltage Output) Where: n is an integer that defines the channel number, in the range 1 n 4 ≤ ≤ x is the output voltage in 4-byte floating-point format, in the range -10 x +10 ≤ ≤ Note: This command applies only to IMP type 1D. Function: Sets the specified channel to the specified voltage. Response: None.
Bytes 6-9 Control bytes (one bit per channel). A bit value of ‘0’ indicates that the channel is set to status input. A bit value of ‘1’ indicates the channel is ‘Not measured’ or ‘Unknown mode, type or range’. Response: None. SW (Software Watchdog) Where: n = 0, to disable the software watchdog n = 1 to 255, to set the software watchdog time-out (in seconds) Note: This command applies only to the Universal IMP (types 1H and 1J), and digital IMP type 2B. Function: Enables or disables the software watchdog. Once the watchdog is enabled, the watchdog output channel (channel 20 for UIMP or 32 for digital IMP) goes from a ‘0’ state to a ‘1’ (no alarm) state. The IMP then expects the ST command to be sent within every ‘n’ seconds. If a time-out period passes without a ST command being received, the output is set to a ‘0’ (alarm) state. (The IMP is not reset.) Disabling causes the output to go into the ‘0’ state. The RE command does not disable the watchdog. Note: Enabling either watchdog causes the output to go into the ‘1’ (no alarm) state. For the output to be disabled from the watchdog, both the hardware and software watchdogs need to be disabled. Response: None. COMMANDS FOR ANALOGUE OUTPUTS CH VO (CHannel VOltage Output) Where: n is an integer that defines the channel number, in the range 1 ≤ n ≤ 4 x is the output voltage in 4-byte floating-point format, in the range -10 ≤ x ≤ +10 Note: This command applies only to IMP type 1D. Function: Sets the specified channel to the specified voltage. Response: None.