Perle Systems STS, SCS Serial Port Coil/Register Descriptions, A4/T4 Registers, Input Registers

Modbus I/O Access

Serial Port Coil/Register Descriptions

This section contains descriptions of serial port coils:

zMB_REG_DI_DSR—The status of the DSR input signal. 1 is Active, 0 is Inactive. If Invert Signal is configured on, 0 is Active, 1 is Inactive. If input is Latched, returns latched status.

zMB_REG_DI_DSR_ALARM_STATE—The alarm state of DSR input signal. 1 is In Alarm state, 0 is Not in Alarm state. A write of any value clears the alarm state.

zMB_REG_DI_DCD—The status of DCD line. 1 is Active, 0 is Inactive. If Invert Signal is configured on, 0 is Active, 1 is Inactive.

zMB_REG_DI_DCD_ALARM_STATE—The alarm state of DCD input signal. 1 is in Alarm state, 0 is Not in Alarm state. A write of any value clears the alarm state.

zMB_REG_DI_CTS—The status of CTS input signal. 1 is Active, 0 is Inactive. If Invert Signal is configured on, 0 is Active, 1 is Inactive.

zMB_REG_DI_CTS_ALARM_STATE—The alarm state of CTS input signal. 1 is Alarm, 0 is Not in Alarm. A write of any value clears the alarm state.

zMB_REG_DO_DTR—The status of DTR output signal. 1 is Active, 0 is Inactive.

zMB_REG_DO_RTS—The status of RTS output signal. 1 is Active, 0 is Inactive.

This section contains descriptions of serial port holding registers:

zMB_REG_HR_DI_DSR_LATCH—The latched status for the DSR signal. 1 is Latched, 0 is Not Latched. A write any value will clear the latch.

zMB_REG_HR_DI_DCD_LATCH—The latched status for the DCD signal. 1 is Latched, 0 is Not Latched. A write any value will clear the latch.

zMB_REG_HR_DI_CTS_LATCH—The latched status for the CTS signal. 1 is Latched, 0 is Not Latched. A write any value will clear the latch.

A4/T4 Registers

The following registers are supported by the IOLAN A4 and T4 Input models:

	Data Model	A1/T1	A2/T2	A3/T3	A4/T4	R/W
Holding Registers:
	MB_REG_HR_AI_CLEAR_ALARM_LATCH	2049	2050	2051	2052	W
	MB_REG_HR_AI_CLEAR_MAX	2113	2114	2115	2116	W
	MB_REG_HR_AI_CLEAR_MIN	2177	2178	2179	2180	W
Input Registers:
	MB_REG_IR_CURR_ENG	2080	2112	2144	2176	R
	MB_REG_IR_MIN_ENG	2082	2114	2146	2178	R
	MB_REG_IR_MAX_ENG	2084	2116	2148	2180	R
	MB_REG_IR_CURR_RAW	2086	2118	2150	2182	R
	MB_REG_IR_MIN_RAW	2087	2119	2151	2183	R
	MB_REG_IR_MAX_RAW	2088	2120	2152	2184	R
	MB_REG_IR_ALARM_LEVEL	2089	2121	2153	2185	R

270 IOLAN SDS/SCS/STS User’s Guide, Version 3.6